Star Trek: TOS - "The Day of the Dove"
Yo ho, yo ho, a Klingon's life for me....
Yes, those nasty swarthy (and BOY are they swarthy in this episode - makeup by Hershey's) are back for the last time in this original series' third season episode (no, I'm not counting the illusory Klingon forefather "Kahless" created by the giant brownie Yarnek in "The Savage Curtain").
Michael Ansara, who was married to I Dream of Jeannie's Barbara Eden (you'll thank me later, Trivia Pursuit fans), lends his deep voice to Kang, captain of the Klingon ship that was shanghai-ed by a swirly, twirly light entity.
Kang and Kirk and their crews go toe-to-toe and sword-to-sword (no, not that way K/S fans), manipulated by Light Brite as it feeds on "strong emotions" (so you can imagine what its Netflix queue is filled with).
They keep on killing each other, reviving, then re-killing each other again, until they all laugh their asses off by watching The Hangover and the twirly light thing gets huffy and leaves as good feelings make it ill (most of this was a true statement).