“Return to Tomorrow” is another in the string of episodes about nigh-omnipotent alien beings made of energy who attempt to hijack the Enterprise and crew for their own devices. However, this one has a twist – the energy beings want to return to physical bodies.

It starts with an omniscient-style simulated distress beacon, luring the Enterprise to a planet which Spock declares is “Class M” – which fans will recognise is normally shorthand for Earth-like, complete with a breathable atmosphere. Only in this case Spock declares that the atmosphere has been ripped away millions of years ago. By my understanding, this should make it no longer class M. At the planet, a mysterious voice identifying itself as Sargon contacts the ship, asking Kirk, Spock, McCoy, and astrobiologist Ann Mulhall to beam down to coordinates deep inside the planet – through “approximately 112.37 miles of rock” as Spock puts it. McCoy, quite rightly in this case, displays his growing fear of the transporter.

They try to beam down with two security guards, but the guards are left behind because Sargon doesn’t want them. It turns out Sargon lives in a glowing ball, one of the last of his kind along with his wife Thalassa and someone from the other side of the final war that destroyed their civilisation, Henoch. Sargon possesses Kirk’s body, placing his consciousness in the glowing sphere, and exults with booming echoey voice in the feeling of having a body again. He explains that they want to build new android bodies to live in, and will need to use Kirk’s, Spock’s, and Mulhall’s bodies temporarily to build them. McCoy complains that the possession is straining Kirk’s metabolism, so Sargon agrees to switch him back. Sargon says the decision is theirs. He also mentions out that their race long ago colonised the Galaxy, and humans and Vulcans may well be their distant descendants – Spock states this may explain some legends from Vulcan prehistory.

The senior officers debate whether to allow Sargon and company to possess Kirk, Spock, and Mulhall, and vote in favour after Kirk gives a Picard-like speech about inalienable rights. Henoch takes Spock, and in his echoey voice delights in the “superior” Vulcan body, which he plans to keep forever. He prepares a formula that will slow down the metabolisms of the bodies to allow them to be possessed for longer periods, but doctors Sargon’s in a sly attempt to kill him. Kirk and Mulhall get to engage in string-free romance thanks to being possessed by Sargon and Thalassa. Alas, the poison takes effect and Kirk drops dead!

Kirk’s body is restored with artificial life support, and Thalassa moves Kirk’s trapped consciousness in Sargon’s glowing ball back to his body. But Henoch in Spock’s body starts taking control of the Enterprise. There’s various fighting and Kirk orders McCoy to inject Spock with a fatal drug to stop Henoch. Spock collapses and Henoch is destroyed, and then Sargon magically reappears as part of Kirk’s secret plan or something and moves Spock’s consciousness from Nurse Chapel where he had temporarily stored it back into his restored body. This gives Chapel and Spock an intimate moment that will probably be the closest they ever get to one another. Sargon possesses Kirk one last time to hold and kiss Thalassa in Mulhall’s body, before they depart, having decided to end their existence together.

There’s more in the details of this story that make it fairly engrossing to watch unfold. The variation on the usual omnipotent alien scenario is different enough to make the formula fresh again, and there are some nice scenes. I call this one definitely above average.

Tropes: Sufficiently Advanced Alien, Energy Beings, Atmosphere Abuse, Girl Of The Week, Ludicrous Precision, Soul Jar, Power Glows, Dying Race, Last Of His Kind, Power Echoes, Precursors, Patrick Stewart Speech, Voices Are Mental, Grand Theft Me, Unspoken Plan Guarantee, Sharing A Body, Together In Death.
Body count: Henoch (destroyed), Sargon and Thalassa (accepted their fate).

“A Private Little War” is another head-on clash between Captain Kirk and the Prime Directive, this time on a planet with an iron-age culture. We learn that Kirk spent some time on the planet neural 13 years earlier performing a planetary survey, and befriended a native, Tyree. He beams down with Spock and McCoy to find Tyree’s tribe. Kirk says the natives are perfectly peaceful and gentle. They are surprised to find themselves in the middle of a fight between two groups of men, one armed with bows and arrows, and the other with flintlock guns! Kirk expresses his disbelief that the natives could have advanced their technology from basic iron smelting to flintlocks in just 13 years. He aims a phaser in self defence, to be reminded by Spock that Prime Directive implies, meaning they are barred form using phasers (so why carry them to the planet?). Instead, Kirk throws a rock – I guess the Prime Directive allows maiming natives with familiar weapons. Spock ends up shot and the party retreats to the Enterprise.

McCoy calls in Dr M’Benga, who interned on Vulcan. He gives Spock some treatment, and all McCoy can do is tell Kirk, “He’ll either live or die now, Jim. I don’t know which.” That’s pretty impressive doctoring! Kirk discusses the flintlocks on the bridge, saying he doesn’t believe it took the natives just 13 years to go from smelting iron to inventing guns. Uhura says the same development took 12 centuries on Earth – not just a communications expert, but a history expert too! Around this point, a Klingon ship appears in orbit. Through skilful piloting, Chekov keeps the Enterprise hidden from the Klingons. Kirk decides the Klingons must be arming some of the natives, and decides to beam down again to gather evidence.

Kirk and McCoy go native, dressing in skins, and beam down again. Kirk starts leading them towards Tyree’s camp, but they are attacked by a mugato on the way – a carnivorous ape-like being. It bites Kirk, injecting venom, before McCoy kills it with a phaser (okay, so I guess phasers are allowed against the wildlife). McCoy doesn’t know how to treat the bite, and Kirk, becoming delirious, tells McCoy to take him to Tyree, because his people can cure the venom.

Tyree has become leader of his tribe, and is married to Nona, a mystical witch woman in a bright orange fake fur bikini. She has the power to cure Kirk, and does so in a highly suggestive way, clearly taking a shine to Kirk and treating Tyree like garbage because he’s too pacifistic to steal advanced weapons off Kirk. Also, Tyree wears an incredibly bad white wig, like all the men of his tribe. When Kirk recovers, he and McCoy raid the enemy camp, finding a Klingon teaching the natives how to make the guns.

Back on the Enterprise, Spock stirs and instructs Nurse Chapel (who had been holding his hand and talking to him) to hit him. Dr M’Benga warned her to do anything he said, so she does, but Scotty interrupts and restrains her. M’Benga appears and slaps Spock around until he gains full consciousness. Only then does he explain that it is part of a Vulcan’s self-healing response – the pain helps him return to consciousness. He could have saved a lot of hassle by telling Chapel that beforehand.

On the planet, Kirk starts teaching Tyree’s tribe to fire captured flintlocks. McCoy objects to this breach of the Prime Directive, but Kirk says the Klingons have broken it, and now they need to even things up again to allow natural cultural progression, rather than a slaughter. Nona seduces Kirk with some magical herbs, but Tyree is too pacifistic to shoot him. Nona however runs off with his phaser after seeing it kill a mugato that attacks them, and takes it to the enemy camp, saying it is a powerful weapon. When Kirk and the villagers chase her, the enemy think it’s a trap and stab Nona, killing her. Tyree is angered and asks Kirk for weapons and training, losing his innocence and pacifism. Kirk agrees and goes back to the Enterprise to instruct Scotty to make 100 flintlocks. Scotty is confused, and Kirk wistfully reiterates, “Serpents, serpents for the Garden of Eden.”

It’s a real downer ending, particularly for Star Trek. The moral dilemma is clearly painted, and Kirk had to make the best of a no-win scenario. With a bit of work, this could have been made a good episode, but the execution is a bit heavy handed and clumsy, and the characterisations of Nona and Tyree a bit too black and white. Another average episode to add to the pile in the middle.

Tropes: Prime Directive, Perfect Pacifist People, Going Native, Witch Doctor, Fur Bikini, People Of Hair Colour, Giving Radio To The Romans, Converse With The Unconscious, Hit Me, Dammit!, Cruel To Be Kind, Training The Peaceful Villagers, Downer Ending.
Body count: 2 mugatos (disintegrated by phaser), Nona (stabbed).

I couldn’t remember what “The Immunity Syndrome” was about before rewatching this episode, and even halfway in I didn’t remember how the rest of the plot played out. Not a good sign, although it’s not actually a bad episode.

It starts with Kirk entering a log about how worn out the crew are as they head to a starbase for much-needed R&R. They never get there, as they are called to an emergency in the Gamma 7A system, where the ship Intrepid, crewed by 400 Vulcans, is patrolling. The Intrepid suddenly vanishes, which affects Spock through some psychic connection, and a scan of the system shows it to be entirely dead – billions of inhabitants, just dead. The Enterprise cancels shore leave and races to investigate, coming across a mysterious black blob in space that reminded me of a giant black pudding from Dungeons & Dragons. This zone produces mysterious readings which Spock can’t describe – not merely can’t understand, but literally can’t describe except to say that he can’t describe them. It also seems to be sucking the life from everyone on the Enterprise, as most of the crew come down with dizzy spells. McCoy gives everybody massive doses of stimulants to keep them going.

So do they flee and report back to a Starbase what they’ve found, before they have all the life drained from them? No, they go into the dark zone! This turns out to be some sort of Bizarro zone, in which they are getting pulled towards an object in the middle, and the only way they can resist it is to use forward engine thrust, which seems to hold them back. They make a big point out of everything affecting things in a backwards way, yet at no point do they even raise the question of whether McCoy’s stimulants might be making them tired rather than alert. The pressure builds as they can’t escape, and everyone on board starts sweating profusely.

At the centre of the dark zone is a giant space amoeba, which Spock speculates is a hostile organism trying to “infect” the galaxy. They send in an unmanned probe, which Spock counts down with the line, “Probe impact in 7.3 seconds.” Couldn’t he have waited 0.3 seconds and just said, “impact in 7 seconds”? The probe basically tells them they need to send a person in to manually take readings, which precipitates a rivalry between Spock and McCoy to volunteer for the suicide mission. Kirk chooses Spock, who flies into the amoeba in a shuttlecraft, stating on the way, “Contact in 18.3 seconds.” Spock sure likes those 0.3 of a seconds.

Spock sends back data which allows them to figure out how to kill the amoeba, then apparently succumbs to its life-draining force. Kirk tells McCoy, “He knew the odds.” They fire some custom-modded photon torpedoes to inject antimatter into the nucleus and destroy the amoeba. They back out of the amoeba and notice Spock’s shuttleccraft drifting, so grab it with tractor beams, despite Spock’s protests to leave him to save power. Scotty declares the ship to be completely dead, with no power – yet the lights are still on on the bridge. Kirk warns the entire crew to “brace for impact”, which results in everyone on the bridge bracing in their seats, except for McCoy, who simply stands next to Kirk’s chair and grabs hold of the railing behind him. You’d think that bracing for impact would involve something slightly more, I don’t know… braced?

The amoeba blows up, and Spock is alive, yay! And power levels quickly return to normal. And the episode ends, really suddenly. There’s no real denouement or amusing ending or anything. All up, the episode is a bit… average. Nothing actually bad, but then nothing particularly memorable either. It’s like a middle-of-the-road monster-of-the-week thing.

Tropes: My Significance Sense Is Tingling, A Million Is A Statistic, Negative Space Wedgie, Bottled Heroic Resolve, Bizarro Universe, Space X, Ludicrous Precision, Suicide Mission, Sadistic Choice, Deus Ex Nukina, Complaining About Rescues They Don’t Like, Not Quite Dead, Monster Of The Week.
Body count: 400 Vulcan crew of the Intrepid, “billions” of inhabitants of the Gamma 7A system, all in the pre-credits sequence.

“A Piece of the Action” is a very memorable episode, though not for the good reasons. It stands out as one of the more bizarre episodes, with Kirk and Spock donning 1920s gangster suits, for the very simple reason that they visit a planet whose entire society is based on 1920s Chicago.

The planet Sigma Iotia II had been visited by the Federation ship Horizon 100 years before the Enterprise arrives. The native society was noted as early industrial, and “highly imitative”. The Horizon never made it back home, and its sublight radio messages meant nobody else heard about Sigma Iotia II until recently. As Kirk, Spock, and McCoy quickly discover when they beam down – directly into the middle of a busy street – is that the planet looks exactly like 1920s Earth. Couldn’t they get some better landing coordinates? I suppose not, given their radio contact told them to meet his men near a “yellow fireplug”. The greeting party brandishes Tommy guns and escorts the trio to the hangout of Bela Okmyx, a “boss” of part of the city.

Okmyx is aware enough that the Federation has high technology, and wants to bargain for advanced weapons to enable him to take out the other bosses and rule unchallenged. This takes place over a game of pool, in which Okmyx hits balls other than the cue ball with his cue for no apparent reason. We learn here why the culture is so bizarrely like 1920s Chicago, as Okmyx reveals a book left by the Horizon: “Chicago Mobs of the Twenties”. Spock deduces that they have adapted their entire culture to imitate the information in the book.

Kirk refuses Okmyx’s deal and there ensues some back and forth shenanigans with various Enterprise crew being locked up, kidnapped by rival boss Krako, escaping, dressing up as gangsters, and so forth. In the one truly memorable scene of the episode, Kirk bluffs his way out of captivity by teaching his captors a “man’s game” – the card game Fizzbin, which he invents on the spot, with wacky rules that mystify the gangsters until he and Spock launch a surprise attack and knock them out. In another entrapped situation, Kirk pulls a MacGyver to rig up a booby trap when captors enter his cell. This is not a particularly serious episode, and Kirk soon starts hamming it up, falling into a ridiculous Chicago gangster accent, and playing off the even more sesquipedalianly loquacious than normal Spock (who Kirk calls “Spocko” at one point). There’s even a bad driving gag, with Kirk taking off in reverse when attempting to drive a car, and Spock saying things like, “I think that lever is called a ‘clutch’.”

Eventually things get sorted when Kirk muscles all the bosses into one room and demonstrates the Federation’s power by having the Enterprise stun everyone on the streets in a one block area. Suitably impressed, the bosses agree to Kirk’s plan to unify and begin economic development rather than keep infighting. He takes a 40% “piece of the action” skimmed off the top for the Federation, which he later explains to Spock and McCoy will go into a Federation fund to help the natives develop a more ethical society of their own.

It’s memorable for the Chicago gangsters, so out of place in a science fiction setting, and Fizzbin. But this episode is so tongue-in-cheek that it’s hard to take it seriously, and the story is pretty lame and full of padding. Below par, but amusing enough to not be a complete disaster.

Tropes: Going Native, Planet of Hats, Mundanization, The Don, Mob War, Gray’s Sports Almanac, Calvinball, McGyvering, Cement Shoes, Dartboard Of Hate, Dramatic Gun Cock, Large Ham, Sesquipedalian Loquaciousness, Driving Stick, Gunboat Diplomacy.
Body count: 1 native gunned down in a gang hit.

“The Gamesters of Triskelion” is what I’d call a turn-key Star Trek episode. It recycles many of the plot elements that can be seen in other episodes, to produce something that certainly feels like Star Trek, but without introducing enough originality to make it memorable.

In a nutshell, Kirk and some others (Chekov and Uhura in this case) mysteriously vanish thanks to the nigh-omnipotent power of some aliens, who then make them fight for their amusement. Meanwhile the remaining crew (Spock, Scotty, and McCoy here) play detective, searching for them and arriving in time to be audience to Kirk fighting to the death against some aliens for the prize of setting himself and the Enterprise free. Anything sound familiar yet?

The hapless crew members are trying to beam down to the creatively named planet Gamma II, where there is an automated communication station. At least this gives Uhura a sensible reason to join a landing party. They never make it, vanishing abruptly from the transporter pad, which allows Spock and Scotty to play off one another when Spock asks if there was a malfunction and Scotty vehemently denies it. Kirk, Uhura, and Chekov appear in a tiny gladiatorial arena. They are immediately attacked by aliens with weapons, two male and two female. Kirk and Chekov take one male each, while Uhura ends up fighting the other two. The females are wearing bizarrely impractical (and shiny) clothing for combat (see the picture), exposing a lot of areas that really should be armoured.

Fight done, we meet the “master thrall” Galt, who assigns each of the crew a “drill thrall” to train them up for combat. Uhura gets the well-proportioned Lars, Kirk gets the severely underdressed Shahna, Chekov gets the homely Tamoon. (Actually Chekov is getting off lightly, since the first thing Lars does is try to force himself on to Uhura. Fortunately she’s had Starfleet combat training.) We learn in some exposition that the thralls are all brought to this planet, Triskelion, by the “Providers”. The thralls train new arrivals, then the Providers bid for and buy them to fight one another as a form of gambling. Discipline is enforced by Collars of Obedience, which can be activated to cause agony.

Kirk naturally resists by seducing Shahna and trying to teach her about love, which she is ignorant of. Meanwhile, Spock and Scotty have completed a scan of the entire Gamma II solar system, within 2 hours. This is an amazing feat, considering that in other episodes we’ve seen the crew racing against time in the impossible task of scanning a single planet with a time limit of several hours or days. They pick up a faint ionisation trail and follow it across 12 light years to Triskelion.

There, Kirk has argued his way into meeting the Providers, who turn out to be a trio of disembodied brains. They express ennui with their near-omnipotence, and their only entertainment is betting on combats between thralls. Kirk challenges them to a more interesting wager, him versus a thrall of their choice for his crew’s freedom. If Kirk loses, he will submit the entire Enterprise crew as thralls, whereas if he wins, the Providers must free all the thralls and then help them to build an enlightened society, which Kirk says will be a fulfilling challenge for them. The Providers agree, but specify Kirk must fight three thralls at once. He kills two, but the injured third is replaced with Shahna. Kirk refuses to kill her, but she surrenders, winning the bet for Kirk. Fortunately the Providers are honest enough to honour it.

Eh, well. It’s not a terrible episode. It’s just a “seen it all before” one.

Tropes: Sufficiently Advanced Alien, Involuntary Battle To The Death, Designated Girl Fight, Space Clothes, Stripperific, Russian Guy Suffers Most, Shock Collar, What Is This Thing You Call Love?, Gladiator Revolt, Brain In A Jar, The Gambling Addict, Duel To The Death, Forced Prize Fight.
Body count: The thralls Kloog and Lars.

Ah, “The Trouble with Tribbles“. I would guess that this is probably the most famous single episode of Star Trek ever produced. It certainly stands out as a distinctive episode for its overall humorous mood, which is very different to anything that has come before. This would fit nicely into Star Trek if it had been a sitcom, rather than a drama.

That’s not to say there’s no drama at all though. The overarching story is a tense standoff between the Enterprise crew and that of a Klingon battlecruiser, both of whom are overseeing attempts to establish control over the disputed Sherman’s Planet under the terms of the Organian Treaty (enacted by the Organians in “Errand of Mercy“). Whichever government can demonstrate better development of the planet’s resources will be awarded control of it. They interact under an uneasy truce on the Federation outpost of Deep Space Station K-7, where Federation Undersecretary in charge of Agricultural Affairs Nilz Baris is in charge of a store of quadrotriticale (a strain of wheat), which he wants protected from the Klingons at all costs. Baris goes so far as to issue a Code One distress call to summon the Enterprise, which gets him on Kirk’s wrong side as Kirk sees this as an abuse of an emergency signal.

Some Klingons initiate a bar room brawl by taunting members of the Enterprise crew and their captain. Scotty resists, until they insult the Enterprise itself, at which he throws the first punch. He is humorously chewed out by Kirk, who confines Scotty to quarters, which Scotty sees as a welcome chance to read technical journals. Before this, a waitress in the bar demonstrates a good example of space clothes, in a skimpy outfit with horizontal candy stripes and a set of butterfly wings attached to her back. The bar is in fact the focal point of much of the episode, since it’s here we meet Cyrano Jones, an itinerant merchant bordering on con-man who convinces the barkeep to buy some tribbles, before wandering bemusedly through the brawl. Tribbles are small balls of fuzz which make soothing purring noises, and Uhura takes a liking to one, which Cyrano gives to her as a sample. And here’s where the trouble starts.

The tribble has babies. And the babies soon have babies. McCoy takes one to examine and determines that they are essentially born pregnant and multiply as fast as their food source allows. Pretty soon they are infesting the Enterprise. When they get into the food synthesisers via the air ducts, Kirk suddenly realises the quadrotriticale on board the space station is under threat. Racing to the storage bins, he finds them full of gorged tribbles and no wheat. Baris is livid, blaming Kirk for this disaster and the loss of Sherman’s Planet. Spock calculates that there are 1,771,561 tribbles. But McCoy notices most of the tribbles are dead or dying, and concludes the wheat was poisoned, probably by a Klingon agent. And here the tribbles show their usefulness, as we’d seen in the bar earlier that they hate Klingons. When Kirk approaches Baris’s assistant Darvin with a tribble, it hisses at him, thus revealing him to be the Klingon agent. Kirk thus saves the day, to the annoyance of Baris.

Back on the Enterprise, Kirk wonders where all the tribbles went. Scotty reluctantly admits he beamed them all over to the Klingon ship just before it went into warp, and everyone laughs.

Overall it’s actually a pretty good story, and the constant humour just makes it enjoyable, not annoying. Adding to it is that they’ve deliberately ramped up Chekov’s tendency to claim everything was invented in Russia or first done by a Russian – he claims no fewer than three such incidences in this episode: that Sherman’s Planet was first surveyed by a Russian, that quadrotriticale was a Russian invention, and that Scotch whisky was invented by “a little old lady from Leningrad”. Other points of interest: This is the first time in the series where we get an exterior shot of a space station (as opposed to a starbase, which are on planets). It’s not a bad model shot either. And we see Cyrano Jones and the bartender haggling prices in credits – another clear example of money in Star Trek. Finally, the main Klingon, Koloth, seemed eerily familiar as I watched this episode, but I couldn’t place the actor. It turns out it’s William Campbell, the guy who played the annoying Trelane in “The Squire of Gothos“. His acting style really makes for a snide and conniving, but cowardly Klingon. It fits the episode, but not Klingons in general. Final judgement: A clever and exceptionally good story, with the comedy elements handled well, and integrated seamlessly around a solid enough nugget of dramatic plot to make this a great episode.

Tropes: Call Back, Truce Zone, Straw Civilian, Bar Brawl, I Take Offense To That Last One, McLintock Punch, Unishment, Space Clothes, Intrepid Merchant, Lovable Rogue, Strolling Through The Chaos, Born As An Adult, Exploding Closet, Ludicrous Precision, Everybody Laughs Ending, In The Original Klingon, Now If You Will Excuse Me I Have A Noun To Verb.
Body count: None!

“Wolf in the Fold” is a murder mystery and courtroom drama with a twist. It’s not a Fair Play Whodunnit, but rather a Clueless Mystery, in that the viewer really has no chance to work out what is happening before our heroes do. In fact, the answer is completely unexpected and bizarre. In hindsight, there are certainly hints, but nothing that would actually let you reach the right conclusion without some astounding insight.

It opens on a close up of a belly dancer, who pulls back to reveal an Arabian-styled room in which Kirk, McCoy, and Scotty are enjoying the dancing show. Dialogue reveals that Scotty is on medical recreation leave on the planet Argelius II, enforced by McCoy after an accident aboard ship gave him a head injury. They mention explicitly that the accident was caused by a female crew member, and they need to eliminate Scotty’s resulting “total resentment towards women.” This is a dubious statement which might have trouble flying in such a straight manner on TV produced today. But it’s necessary to build towards the mystery.

Kirk has invited the belly dancer to their table, and introduces her to Scotty, then suggests they take a walk outside in the fog. The implication is that the society is extremely sexually permissive, and that Kara’s “attentions” will “cure” Scotty. Kirk and McCoy head out to a place where the women are… not described as the statement is cut off, but again the implication is pretty clear. They never arrive, as the fog is pierced by a scream and Scotty is found looming over the dead Kara with a bloody knife in his hand.

Scotty is the obvious suspect, and the Argelian prefect Jaris begins an investigation with the help of the Rigellian off-worlder Hengist. (The native Argelians hire off-worlders as bureaucrats since they are far too hedonistic to do such work themselves.) Scotty can’t remember what happened. Kirk gets a Lieutenant Karen Tracy to beam down with a device capable of reading his memories of the past 24 hours. However, when left alone with Scotty she ends up dead too, with Scotty again holding the bloody knife. Again he can’t remember what happened.

Jaris’s wife Sybo has empathic powers and holds a seance-like ceremony to read psychic impressions. We are treated to a cool overhead shot of the ceremony. During it, Sybo goes into a trance and declares that an evil force is present, calling it a series of names: “Beratis”, “Kesla”, “Redjac”. The lights go off briefly, and when they come back on Sybo falls dead with the knife in her back, Scotty standing right behind her. Jaris takes this remarkably well, and agrees to let Kirk hold a hearing on the Enterprise with a computer lie detector (we saw this back in “Mudd’s Women“, although Kirk seems to have forgotten about it when it would have been useful in “The Alternative Factor“). Scotty passes when he says he doesn’t remember killing anyone.

Kirk asks the computer to look up the name “Redjac”, and it comes up with it as a homonym for “Red Jack”, another name for Jack the Ripper, who notoriously murdered several women in 19th century London. Kirk accepts this rather bizarre link at face value far too readily, showing no scepticism whatsoever. He quickly has the computer list similar murder sprees, and discovers they extend off Earth, in a straight line towards Argelius, with the most recent murders occurring a few years ago on Rigel – where Hengist comes from. Hengist tries to escape, but is knocked out by Kirk. Hengist’s body is dead, but the evil entity inhabiting it moves into the Enterprise‘s computer system, taking control of the ship.

Spock speculates that the entity feeds on fear, and targets women because “women are more easily terrified than men” – another interesting piece of 1960s logic that would be questioned today. Another unfortunate implication that is glossed over is that Jack the Ripper targeted prostitutes specifically – which would imply something about the victims so far. Kara maybe, but Lieutenant Tracy?! And Sybo, the prefect’s wife??! Spock sets the computer the task of computing the last digit of pi, which eventually consumes all of its processing power, rendering Redjac harmless. Redjac returns to Hengist’s body, but Kirk has it bundled into the transporter and beamed into space on “maximum dispersion”, which should spread it widely enough to destroy it.

All up, a pretty good episode. The mystery aspect is certainly engrossing, keeping you wondering both how they’re going to prove Scotty is innocent, and how the murders were committed. Hengist is a little obvious as the culprit, because he keeps protesting in his whiny voice about everything Kirk does, but until the reveal it’s completely impossible to figure out how. The Ripper connection is surprising at first, but is worked into the story reasonably well. It’s now you realise that the fog in the opening scenes is significant, evoking Victorian London. The more you think about it, the more clever this episode becomes. Not one of the greats, but a very acceptable instalment.

Tropes: Courtroom Episode, Clueless Mystery, Belly Dancer, Ominous Fog, Hired To Hunt Yourself, Frameup, Spooky Seance, I Have Many Names, Lights off Somebody Dies, Never One Murder, Orgy Of Evidence, Clear Their Name, Lie Detector, Jack The Ripper, Beethoven Was An Alien Spy, Regularly Scheduled Evil, Puppeteer Parasite, Haunted Technology, Emotion Eater, Hysterical Woman, Logic Bomb, Body Surf, Softspoken Sadist.
Body count: The dancer Kara, Lt Tracy, the prefect’s wife Sybo. All stabbed.