Re: Which movie is most like a TOS episode?
I'm going with The Search for Spock
Thematic similarities with Amok Time
about friendship and sacrifice plus I think Christopher Lloyd is my third favorite Klingon behind Kang and Kor, an absolute scene-chewer in the best TOS tradition.
"...the most elementary and valuable statement in science, the beginning of wisdom, is I do not know." - Lt. Commander Data, "Where Silence Has Lease"