"Tomorrow is Yesterday" was the 21st episode of Star Trek: The Original Series produced in the show's first broadcast season, first aired on 26 January 1967. The episode was written by D.C. Fontana, directed by Michael O' Herlihy and novelized in Star Trek 2 by James Blish.

References[edit | edit source]

Characters[edit | edit source]

Episode characters[edit | edit source]

Robert AbramsClifford BrentJohn ChristopherLucas FelliniBill HadleyJames T. KirkJohn KyleRyan LeslieLeonard McCoyMontgomery ScottSpockHikaru SuluNyota UhuraWebbUSS Enterprise computerunnamed US military personnel (Air Police staff sergeant)
Referenced only 
Shaun Geoffrey Christopher

Novelization characters[edit | edit source]

AmesJohn ChristopherJames T. KirkLeonard McCoyMontgomery ScottSpockHikaru SuluNyota Uhura
Referenced only 
Shaun Geoffrey Christopher

Locations[edit | edit source]

EarthOmaha, Nebraska

Starships and vehicles[edit | edit source]

Bluejay 4 (F-104 Starfighter) • USS Enterprise (Constitution-class heavy cruiser)

Races and cultures[edit | edit source]


Technology and weapons[edit | edit source]


Materials and substances[edit | edit source]


States and organizations[edit | edit source]

FederationStarfleetUnited States Air ForceVegan Tyranny

Ranks and titles[edit | edit source]

captaincommandercommanding officercommunications officerFederation Starfleet ranksFederation Starfleet ranks (2260s)first officerlieutenant commanderofficerscientistscience officer

Other references[edit | edit source]

anatomyarmbootclothingFederation membersfingerfive-year missiongovernmenthumanoidlanguagelifeformlogicmattermemorynation-stateorbitpantsquadrantraces and culturesrankspacestarstardateStarfleet uniformStarfleet uniform (2260s)technologytitletunicuniformuniverseweaponSlingshot effectchicken soup

Appendices[edit | edit source]

Related media[edit | edit source]

Novel adaptations[edit | edit source]

Video releases[edit | edit source]

Images[edit | edit source]

Episode images[edit | edit source]

Adaptation images[edit | edit source]

Connections[edit | edit source]

Timeline[edit | edit source]

published order
Previous episode:
The Alternative Factor
TOS episode produced Next episode:
The Return of the Archons
Previous episode:
TOS episode aired Next episode:
Court Martial
Previous story:
A Taste of Armageddon
Star Trek 2
Next story:
Errand of Mercy
chronological order
Previous Adventure:
The Alternative Factor
Pocket Next Adventure:
Web of the Romulans
Previous Adventure:
The Alternative Factor
Voyages of the
USS Enterprise (NCC-1701)
(2264 to 2270)
Next Adventure:
Vicious Circle!

External links[edit | edit source]

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