The episode which was the basis for Star Trek II: The Wrath of Khan.
It all begins when the Enterprise comes across the S.S. Botany Bay, an apparent derelict from the 1990s, which the characters handily remind each other was when Earth was nearly destroyed in a world-wide war which was not World War III. This war was caused by scientists creating genetically-superior humans. These superhumans decided to Take Over the World, but ultimately ended up fighting amongst themselves.
Kirk, Bones, Scotty and Lt. Marla McGivers (Madlyn Rhue, our Girl of the Week) beam onto the Botany Bay, finding it full of Human Popsicles. Ricardo Montalban, who we're told is Indian, wakes up and McGivers falls in Love at First Sight. In Sickbay, he's discovered to be superhuman, holds a knife to McCoy's throat and says his name is "Khan", but refuses to answer any other question. Kirk decides it's a good idea to let Khan look at all the technical information on the Enterprise. Meanwhile, McGivers gets to have a rather lame love scene with Khan in which we learn she wears her hair in a 1960s updo (which looks uncannily like a wig) because it's "comfortable."
Kirk and Spock question Khan some more and he as good as admits that he was one of the superhuman Evil Overlords from the '90s. Since Evil Is Sexy, McGivers takes Khan's side and apologizes to him for how rude everyone else was. He then manipulates her feeble female mind into agreeing to help him hijack the ship. With her help, he unfreezes his Evil Minions and takes over Engineering. It turns out he actually learned a bit from those tech manuals and cuts off life-support systems to the bridge. After everyone has passed out, he treats them to Kirk's torture in a decompression chamber, offering to let him live if someone joins him.
At this point, McGivers has had enough and sets Kirk free, begging him to let Khan live. This leads to Kirk and Khan's Stunt Doubles having a big Professional Wrestling-style fight which ends in Khan's defeat despite his superior strength due to Kirk breaking off a mechanical lever from the ship as an Improvised Weapon. Kirk and Khan agree that he and his followers will be dumped on the savage planet Ceti Alpha V, providing Khan the opportunity to build his own empire. McGivers decides to go with Khan rather than face court-martial. Kirk and Spock speculate about what will become of them:
Kirk: Yes, Mr. Spock. It would indeed.
This episode includes the following tropes:
- Absentee Actor: Sulu doesn't appear in this episode. He was replaced by Makee K. Blaisdell as Lt. Spinelli.
- All There in the Script: In the original script, the Botany Bay's log stated that the ship was originally headed for the Tau Ceti star system. Examination of the ship reveals a damaged steering system, which has sent the Botany Bay careening off-course into deep space.
- Admiring the Abomination: Kirk, Bones and Scotty give Spock a good shake when they admit a certain admiration for Khan, even if they still acknowledge he's evil.
- Affably Evil: Khan. He's surprisingly charming and polite for being a former dictator. Or not, considering how many dictators have come to power through charm and charisma.
- Ambition Is Evil: As Spock describes Khan and his fellow augments, "Superior ability breeds superior ambition."
- Badass Bookworm: McCoy tells Khan to "make up [his] mind" how to kill him and even tells him the "most effective" way to do it. Even Khan is impressed.McCoy: It would be most effective if you would cut the carotid artery, just under the left ear.Khan: (releases him) I like a brave man.McCoy: (humbly) I was simply trying to avoid an argument.
- Badass Normal: Kirk. He beats the tar out of a supposed "superman" with nothing but his bare fists and a PVC pipe.
- Scotty scores a one-punch knockdown of one of Khan's henchmen, before escaping the briefing room.
- Beware the Superman/No Transhumanism Allowed: Khan is the reason why, as far forward as Star Trek: Deep Space Nine, Bio-Augmentation is forbidden.
- Born in the Wrong Century: Marla feels this of herself, preferring to be in the more "adventurous" 1990's.
- Death Glare: One of Khan's Mooks smacks Uhura when she hesitates to carry out Khan's order. Good thing Marla intervenes, because by the looks of Uhura's face, she was about to seriously beat that guy's ass.
- "Die Hard" on the Enterprise: The Ur-Example of this as far as the Star Trek franchise goes (and there would be a lot more examples - we're looking at you, Enterprise). Kirk and his crew have to sneak through the Enterprise to undermine Khan and his followers.
- Does Not Like Shoes: Khan's female followers all wear form fitting bodysuits, but no shoes. And of course they have the Most Common Superpower.
- Doomed by Canon: Marla won't survive to the events of Star Trek II.
- Evil Counterpart: One of the reasons Khan became so popular; he is a perfect match for Kirk in both fighting prowess and strategic capability.
- Evil Overlord: Khan, with charisma to spare. You think this episode is bad, wait'll you see Wrath Of Khan!
- "Facing the Bullets" One-Liner: When Khan wakes up in sickbay, her purloins a scalpel; when Dr. McCoy returns he grabs him by the throat and holds it to his neck. Bones remains calm enough to respond, "Well, either choke me or cut my throat. Make up your mind!" Khan is impressed by his courage.
- Fangirl: McGivers is one for, as Khan puts it, "bold men from the past", such as Leif Erikson, Richard The Lion Heart, Napoleon Bonaparte, and Khan himself. She even draws Fan-Art of them!
- Forced to Watch: In one of Khan's nastier moments, he makes the crew watch Kirk suffocate in an effort to force them to follow him.
- Foreshadowing: Probably unintended at the time, but Spock's musing on what they would find upon returning to the planet on a later occasion essentially serves as a Sequel Hook leading into Star Trek II: The Wrath of Khan.
- Freudian Slip: Marla tells Khan how fascinated she is by men of...that is, the world of the past.
- Go Look at the Distraction: Marla tells the guy in charge of killing Kirk to keep an eye on him — and then uses the off-button hypospray on him.
- The Guards Must Be Crazy: Khan, a superstrong megalomaniac, is being held in a room with one guard outside the door. He busts out and flattens the guard in short order. At least in the resulting trial, the Red Shirt bailiffs are too smart to allow that stunt again and have multiple ones holding him at phaser point to make sure he behaves himself.
- High-HeelFace Turn: McGivers, after a manner of speaking. She still loves Khan, but she is unwilling to watch him execute her captain and the other officers.
- Human Popsicles: Khan and Company, before being woken up.
- "I Can't Look!" Gesture: Uhura turns off the viewing screen on which Khan is showing them Kirk suffocating.
- Idiot Ball: Hey Kirk, really think it's a good idea to let the superpowered stranger get complete access to the technical blueprints of the ship?
- Hey Kirk, do you think the girl who is enamored with the ambitious superman who is able to manipulate people should be allowed to hang out with him that much?
- Innocuously Important Episode: At first glance, it seems like another example of episodic 60's-era TV: a bad guy named Khan tries to take over the Enterprise, Kirk outwits him and exiles him and his followers to an uninhabited planet, life goes on. Then Khan returns in Star Trek II: The Wrath of Khan, and the ensuing events greatly influence the rest of the TOS-era movies and set up some plot points for the subsequent Trek TV series and the reboot movies.
- Instant Sedation: Of the gas variety. Khan escapes the briefing room before it can affect him. Scotty also escapes, but clearly got a mouthful and is noticeably weakened.
- Kick the Dog: One of Khan's men slaps Uhura after she shoots him a Death Glare.
- Large Ham: Kirk, as usual. Not even a silly little thing like suffocation can stop Jimmy-boy from serving up the ham.
- Letting Her Hair Down: Marla does this for Khan after he criticizes her updo.
- A Lighter Shade of Black: While still an Evil Overlord, Khan is said to have been the most benevolent of all the genetic supermen, ordering no massacres and never waging wars until he was attacked.
- Meaningful Name: The Botany Bay is named after Great Britain's first penal colony in Australia.
- Names to Run Away from Really Fast: Come on, Kirk, his name is Khan. Why Don't Ya Just Shoot Him?
- Of course, technically, "Khan" is his title, not his name, which is "Noonian Singh."
- No Good Deed Goes Unpunished: Kirk takes in Khan and his men after he finds them floating in space and on the verge of dying when their ship systems fail. Khan returns the favor by attempting to kill Kirk and take over his ship. Much, much later, in Star Trek II: The Wrath of Khan, Chekov calls out Khan for this, pointing out that Khan and his people were marooned precisely because of this.
- Nostalgia Filter: Pointed out by Spock In-Universe. The human command crew view Khan through distant centuries, remembering him from their history classes fondly as the least evil of the Eugenics Wars' genetic supermen and they have the impression he was 'firm but fair'. Spock has a different and, it turns out, more accurate perspective that Khan was still a ruthless tyrant. This is probably meant to reflect how people romanticize historical figures like Napoleon and, indeed, Genghis Khan, as well as the old saying that Mussolini 'made the trains run on time'. (In fact, McGivers lovingly lists Napoleon as one of the figures whom Khan reminds her of.)
- That said, Kirk argues that they may admire him on some level but are still aware of who he is. Given that episode ends with Kirk exiling him on a uncivilized planet, preventing him from harming anyone but still giving him a chance to create civilization on his terms, the story arguably supports his view of Khan more than Spock's.
- Obvious Stunt Double: The fight between Ricardo Montalban's stuntman and whoever was doubling for William Shatner. (Possibly Gary Combs.)
- Obviously Evil: Khan might as well have "Supervillain" stamped on his forehead.
- Pride: Khan's Fatal Flaw.
- Put on a Bus: Khan and his followers. It came back, though.
- The Right of a Superior Species: The supermen.
- Sacred Hospitality: Khan tramples all over it.
- Sealed Evil in a Can: Khan Noonien Singh and his cryogenically frozen followers.
- Smug Super: Khan, full stop. He has no problem telling Kirk and Co. to their faces that they are "honestly inferior."
- The Social Darwinist: This is Khan full stop—and a large part of the reason he is so horrible.
- Super Strength: Khan can crush a phaser in his hands, pull open the door to his quarters on the Enterprise unaided, and effortlessly throw Kirk across the room.
- Take Over the World: Seemingly Khan's objective.
- Taking You with Me: With Khan's plan to take the Enterprise going south, he activates the Self-Destruct Mechanism, forcing Kirk to take him out and shut the sequence down.
- 20 Minutes into the Future:
- The establishment of the Eugenics Wars in the 1990s naturally caused the franchise some problems when it was still going strong when the decade actually came around. One of the novels makes a truly heroic effort to fit it into real history, explaining how the wars could have happened with no one knowing about them.
- In contrast, the Star Trek: Khan comic miniseries dispels all pretense and pushes it straight into Alternate History, depicting Khan and his followers nuking Washington DC and Moscow... IN 1992!
- The slower-than-light ships like the Botany Bay will be obsolete in 2018.
- Übermensch: Khan and his followers are physically and mentally superior to ordinary humans.
- Virtue Is Weakness: When Marla McGivers asks to be excused from seeing her captain and the other officers executed, Khan comments "I had hoped you would be stronger."
- Would Hit a Girl: Khan and his underlings.
- Wrestler in All of Us: Kirk uses several wrestling moves against Khan in their climactic fight. A piece of Fridge Brilliance; Khan is superhumanly strong and tough and is able to No-Sell direct strikes, but he still only weighs as much as a normal human and can still be grappled and thrown.