History Recap / StarTrekS3E7DayOfTheDove

* SuspiciouslySimilarSubstitute: Like Koloth in "[[{{Recap/StarTrekS2E15TheTroubleWithTribbles}} The Trouble with Tribbles]]", Kang was made as one for Kor from "Errand of Mercy", because John Colicos was unavailable yet again.

* [[YouKilledMyFather You Killed My Brother]]: Why Chekov is so pissed at the Klingons--except he's an only child.

* EnergyBeing: Again with the Klingons? Again with the EnergyBeing! Kirk and co. fight these more often than the Klingons!

* EvenEvilHasStandards:
** When Kang sneers that a Klingon would not have surrendered (as Kirk does to save Chekhov from being tortured to death), he is setting himself a high mark to live up to. He does so by refusing to be blackmailed by the threat to Mara, saying only "She is a victim of war; she understands". He'll have Kirk's head stuffed and mounted on the wall for it, but he won't dishonour either himself or his wife by giving in.
** Additionally, there is a time for even Klingons to stop killing, and that's when the killing is to serve ''someone else's'' ends instead of their own.

* SmackOnTheBack: At the end of the episode where the characters are laughing together to drive out the alien, Kang slaps Captain Kirk on the back so hard that he's staggered.

'''Kang:''' Out! We need no urging to hate humans. But for the present, only a fool fights in a burning house. '''OUT!'''\\

* TheReasonYouSuckSpeech: Scotty, of all people gives Spock a BLISTERING one. But he isn't himself.

* RedShirtArmy: The only ''actual'' casualties are the majority of Kang's crew, killed by the alien.

* OOCIsSeriousBusiness: So many out-of-character freak outs!

** Scotty all-out accuses Kirk of jeopardizing TheFederation for not letting the Klingons die in the first place.

* NotSoDifferent: Bones and Mara each accuse the other side of the same kinds of atrocities--death camps, torture, experiments, etc.

* HumansAreBastards: Mara thinks so.

* IHaveYourWife: Kirk bluffs Kang with this. He doesn't fall for it.

* HatePlague: An Energy Being that feeds on hate brings the Federation and the Klingons, who are trying to abide by the peace treaty, into conflict. It goes as far as implanting False Memories so that the manipulated will have an extra source of conflict. An interesting part of this trope in Star Trek is that those who are killed are somehow brought back to life with their fatal wounds healed to fight again. Once they all figure it out the creature is repelled from the ship by laughter. Lots and lots of laughter.

* DissensionRemorse: After an argument on TheBridge nearly leads to an all-out fight.
--> '''Kirk:''' ''(to Spock)'' STOP IT, YOU HALF-HUMAN … what am I saying? What are we ''doing'' to each other?

* OutgrownSuchSillySuperstitions: Kirk tells Kang, "Go to the Devil!" (Couldn't say "Go to Hell" on TV in the 60's.) Kang replies, "We [Klingons] have no Devil... but we are very familiar with the habits of yours." Cue use of torture. In [[Series/StarTrekTheNextGeneration later]] [[Series/StarTrekVoyager series]], it would be revealed that Klingon mythology does have a character called Fek'lhr who is much like the Judaic version of Satan, i.e., [[PunchClockVillain not necessarily evil,]] [[EverybodyHatesHades just having an unpleasant responsibility.]] Klingons ''very much'' have an equivalent of Hell, known as Gre'thor, of which Fek'lhr is the guardian. It's eventually clarified that Fek'lhr brings the souls of the dishonored to Gre'thor, and is absolutely not corrupter like the human concepts of Satan. So while "go to the Devil" means nothing to a Klingon, "go to Fek'lhr" would've been a grave insult indeed.

** {{Subverted}} with [[NiceGuy Sulu]], who is apparently the only one who's never affected by the energy being.

* GettingCrapPastTheRadar: "Keep your Vulcan hands off me!" The script writer was apparently delighted when Jimmy Doohan made the decision during rehearsals to emphasise the word 'Vulcan' as if it were a swear word.

* NotWhatItLooksLike: Kang sees Mara's torn tunic and growls "I see why the human beast did not kill you," [[GettingCrapPastTheRadar implying]] that he thinks she was raped. Mara insists that Kirk didn't harm her and is telling the truth about the situation.

[[Theatre/TheOddCouple Can two warring species drive a hate-fueled alien life form from a starship without driving each other crazy?]]

* AttemptedRape: Chekov to Mara, while Chekov is under the influence of the alien.

* EvenEvilHasStandards: When Kang sneers that a Klingon would not have surrendered (as Kirk does to save Chekhov from being tortured to death), he is setting himself a high mark to live up to. He does so by refusing to be blackmailed by the threat to Mara, saying only "She is a victim of war; she understands". He'll have Kirk's head stuffed and mounted on the wall for it, but he won't dishonour either himself or his wife by giving in.

* WhamLine: When Kirk explains to Sulu that Chekhov’s apparent hatred of Klingons stems from the death of his brother Piotr, Sulu informs Kirk that Chekhov is an only child. This is one of the earliest signs Kirk notices that something unusual is happening.

-->'''Kirk:''' Get off my ship. You're a dead duck here. You're powerless. We know about you, and we don't want to play. Maybe there are others like you around. Maybe you've caused a lot of suffering, a lot of history, but that's all over. We'll be on guard now, ready for you. So ship out! Come on! Haul it!\\
'''[=McCoy=]:''' Yeah, out already.\\