Tomorrow is Yesterday (Episode)

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Myriad Universes: "Tomorrow is Yesterday"
Tomorrow is Yesterday
"Tomorrow is Yesterday" (TOS21)

"Tomorrow is Yesterday" (TOS21)
Series Star Trek
Season 1
Episode 19
Production Number 21

Previous The Alternative Factor (TOS20)
Next The Return of the Archons (TOS22)
Released 26 Jan 1967
Prime Timeline
(The root of all realities)

Stardate 3113.2: The Enterprise is thrown back to 20th century Earth.

After an encounter with the gravitational forces of a "black star," the Enterprise is hurled backward in time to the twentieth century. Flying over Nebraska, the starship is sighted and classified as a UFO, and Air Force pilot Captain John Christopher photographs the Enterprise with his jet's wing cameras. When his jet is accidentally destroyed by the starship's tractor beam, he is transported aboard. After first deciding that it would not alter history if Christopher never returned to Earth, Spock then discovers that Captain Sean Geoffrey Christopher, the pilot's as-yet-unborn son, will lead an important expedition into space.

This leaves Kirk and crew with three large problems: retrieving the film that shows the Enterprise in Earth's atmosphere; getting the pilot back where he belongs; and returning to their own time without changing history. After Sulu, Kirk, and Spock surreptitiously obtain the film, Scotty duplicates the "slingshot effect" responsible for their temporal displacement. Christopher is returned to his jet, and the Enterprise returns home.

Image Gallery

Related Data

Astrometrics Alpha Centauri; Cygnet XIV; Earth; Mercury; Nebraska; North America; Offutt Air Force Base; Omaha; Pluto; Saturn; Sol system; Starbase 9
Chronology Prime Timeline; July 1969; 2267; Stardate; 3113.2-3114.1
Culture devil; English language; marriage; martial arts; trophies
Food chicken soup; coffee
People Air Force Captain; Air Police Sergeant; Air Policeman; Christopher, John; Christopher, Shaun Geoffrey; Crewman; Enterprise Security Chief; Fellini; Kirk, James T.; Kyle; Leslie; March, M.; McCoy, Leonard; Redshirt; Scott, Montgomery; Spock; Sulu, Hikaru; Uhura, Nyota; Webb
Politics Air Police; espionage; Starfleet; Starfleet Control; Starfleet Ranks (Crewman, Ensign, Lieutenant, Lieutenant Commander, Commander, Captain); United Earth; United Earth Space Probe Agency; United States Air Force; United States of America; United States Navy; USAF Air Defense Command; USAF Ranks (Airman, Staff Sergeant, Captain, Lieutenant Colonel, Colonel)
Science & Technology Apollo Program; atmosphere; audio receiver; biobed; black star; books; camera; chronometer; communications; communicator; computer; deflector dish; escape velocity; film; film projector; flashlight; flight suit; gravity; impulse drive; magnetic tape; medical scanner; missiles; nacelle; nuclear weapons; orbit; PADD; phasers (Type 1, Type 2); pistol; radar; radio; revolver; rubber band; shields; siren; solar flare; telephone; time (minute, hour, week); time travel; time zones; tractor beam; transporter; turbolift; viewscreen; voice recognition; warp drive; weather balloons
Ships & Vehicles aircraft; Apollo 11; Constitution class; U.S.S. Enterprise NCC-1701; F-104 Starfighter
Xenology chickens; horses; Humans; hybrids; Vulcans
Miscellaneous 498th Air Base Group; Blackjack; Bluejay 4; bridge; briefing room; captain's quarters; commanding officer; engineering; first officer; museum; science officer; sickbay; Starfleet Uniforms (2266); UFO; USAF Uniforms; Vulcan nerve pinch


William Shatner

Also Starring
Leonard Nimoy as Mr. Spock

Directed by
Michael O'Herlihy

Written by
D.C. Fontana

Produced by
Gene L. Coon

Executive Producer
Gene Roddenberry

Created by
Gene Roddenberry

Associate Producer
Robert H. Justman

Script Consultant
Steven W. Carabatsos

Also Starring
Roger Perry as Major Christopher

DeForest Kelley as Dr. McCoy
Hal Lynch as Air Police Sergeant
Richard Merrifield as Technician
John Winston as Transporter Chief
Ed Peck as Col. Fellini

James Doohan as Scott
George Takei as Sulu
Nichelle Nichols as Uhura
Mark Dempsey as Air Force Captain
Jim Spencer as Air Policeman
Sherri Townsend as Crew Woman

Music Composed and Conducted by
Alexander Courage

Director of Photography
Jerry Finnerman

Art Directors
Rolland M. Brooks
Walter M. Jefferies

Film Editor
Bruce Schoengarth

Assistant to the Producer
Edward K. Milkis

Assistant Director
Michael S. Glick

Set Decorator
Marvin March

Costumes Created by
William Theiss

Post Production Executive
Bill Heath

Music Editor
Jim Henrikson

Sound Editor
Douglas H. Grindstaff

Sound Mixer
Jack F. Lilly

Photographic Effects
Westheimer Company

Script Supervisor
Billy Vernon

Music Consultant
Wilbur Hatch

Music Coordinator
Julian Davidson

Special Effects
Jim Rugg

Property Master
Irving A. Feinberg

George H. Merhoff

Head Grip
George Rader

Production Supervisor
Bernard A. Widin

Makeup Artist
Fred B. Phillips, S.M.A.

Hair Styles by
Virginia Darcy, C.H.S.

Wardrobe Mistress
Margaret Makau

Joseph D'Agosta

Glen Glenn Sound Co.

A Desilu Production

In Association with
Norway Corporation

Executive in Charge of Production
Herbert F. Solow