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?
, who was by no means a leading man in 1930, was not the original choice of reference. The final shooting draft of this script has Edith reference "a Richard Dix
movie", but the crew on the set felt Dix's name wouldn't be familiar to viewers in the 1960s. See more
When McCoy first runs into the area of the portal and away from the landing party, he puts his hand on a brown metal or concrete beam lying flat on the ground (in ruins). However, the beam can be seen moving back and forth with his light touch-obviously a prop. See more
[tending to an injured and unconscious Sulu
There's a heart flutter. I'd better risk a few drops of cordrazine.
That's tricky stuff - are you sure you want to risk...
[McCoy administers the cordrazine, and Sulu's eyes open
You were about to make a medical comment, Jim?
Who, me, Doctor?
The closing credits are set against a combination background of stills from that episode and previous episodes. See more
Theme From Star Trek
Written by Alexander Courage See more