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Tomorrow Is Yesterday
Production Number 21
Air Date (US) 1967-01-26
Season 1
DVD Disc No. 5
Watch Episode Trailer (.mov QuickTime format - 2.468 MB)See Episode Photos  
William Shatner as James T. Kirk
Leonard Nimoy as Spock
DeForest Kelley as Leonard H. McCoy
James Doohan as Montgomery Scott
Nichelle Nichols as Uhura
George Takei as Hikaru Sulu

Guest Cast:
Majel Barrett as Computer Voice
Roger Perry as Captain John Christopher
Ed Peck as Colonel Fellini
Hal Lynch as Air Police sergeant

Creative Staff:
Director: Michael O'Herlihy
Written By: D. C. Fontana
When the U.S.S. Enterprise is thrown into a time warp by a black star, it ends up orbiting Earth in the 20th century. Omaha Air Base detects a peculiar UFO and sends a fighter plane, manned by Captain John Christopher, to investigate.
The starship accidentally destroys the plane, caught in their tractor beam, so the pilot is beamed aboard. The problem now, of course, is to prevent Captain Christopher from returning to tell others on Earth. In order not to change history, in which Christopher's son will prove important, Kirk must return the captain to Earth without knowledge of the ship.

In an attempt to remove all records of the U.S.S. Enterprise sighting, Kirk and Sulu beam down to the air base. Kirk is almost immediately captured by the Air Police, though Sulu manages to escape and gets the stolen records to the U.S.S. Enterprise. Spock and Captain Christopher beam down to help get Kirk away from the Air Police. At the same time, an Air Police sergeant has been accidentally caught in the U.S.S. Enterprise's transporter beam and is reeling as he finds himself on a 23rd-century starship.

Spock and Scotty manage to recreate the conditions of the time warp that brought them to this time, with a slingshot effect around the Sun. The confused Air Police sergeant is returned to Earth a second before he was transported to the Enterprise, so he will remember nothing of his astounding experience, and the starship returns to the 23rd century.

This time, the pilot sees nothing and the Air Force concludes that the sighting was a mistake ... a UFO. In effect, everything that had happened, never happened.
Roger Perry (Captain John Christopher) and his wife were mobbed at their first Star Trek convention. His wife: comedienne Jo Anne Worley, then enjoying great success in one of TV's most popular series, Laugh-In.
This episode was the first for John Winston (Lieutenant Kyle). He is seen in the transporter room in an additional ten episodes.




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