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?
Director Joseph Pevney
couldn't complete all scenes scheduled to be filmed at 40 Acres on schedule. However, the backlot was already booked for filming by The Andy Griffith Show
(1960), so the arrival of McCoy to the past and Rodent's death had to be filmed on a studio alleyway behind Desilu Stage 10. See more
During the early bridge scene, shots filmed from the front of the bridge clearly show a red uniformed female standing next to the center seat. When the shot switches to the view from the rear, she disappears, even though that section of the bridge is still in shot, and reappears when the view returns to the view from the front. In addition, Kirk looks different in the rear view shot, as if this section was filmed with a stand in for William Shatner
. See more
Captain's log, no stardate. For us, time does not exist. McCoy, back somewhere in the past, has effected a change in the course of time. All Earth history has been changed. There is no Starship Enterprise. We have only one chance. We have asked the Guardian to show us Earth's history again: Spock and I will go back into time ourselves and attempt to set right whatever it was that McCoy changed.
The closing credits are set against a combination background of stills from that episode and previous episodes. See more
Referenced in Sleepy Hollow: Ragnarok
Theme From Star Trek
Written by Alexander Courage See more