When an accident causes Dr. McCoy to go temporarily insane, he escapes to a strange planet. There, the search party discovers a device left by a superior, vanished civilization, a time portal that plays the history of Earth for them - but then Bones jumps through it into the past, causing a change in history important enough to make the Enterprise vanish. Kirk and Spock, who fortunately made a tricorder recording, must attempt to go through to just before McCoy's arrival and stop him from changing history in the United States during the Great Depression, where they have no advanced technology available. Written by
Did You Know?
In one scene in this episode, a poster can be seen advertising a boxing event at Madison Square Garden featuring "Kid McCook" vs. "Mike Mason". For Star Trek: Deep Space Nine: Past Tense: Part 2
(1995), scenic artists Doug Drexler
and Michael Okuda
created a near replica of this boxing poster for a scene set in 1930 San Francisco; the DS9 poster features the same boxers, and says that it is "their first rematch since Madison Square Garden". See more
Kirk and Spock run down a 21st Street in Manhattan that curves; the real West 21st and East 21st Streets do not. See more
Assassins! Murderers! Murderers! Assassins!
[he spots a homeless man
You! What planet is this?
[the homeless man runs away
[chasing after him, shouting crazily
No! Don't run! I won't kill you! It's *they* who do the killing! Don't run! I won't kill you!
The closing credits are set against a combination background of stills from that episode and previous episodes. See more
Referenced in Frasier: Star Mitzvah
Theme From Star Trek
Written by Alexander Courage See more