Star Trek: Season 1, Episode 19

Tomorrow Is Yesterday (26 Jan. 1967)

TV Episode  -   -  Action | Adventure | Sci-Fi
Your rating:
    1 2 3 4 5 6 7 8 9 10 -/10 X  
Ratings: 7.9/10 from 1,030 users  
Reviews: 11 user | 9 critic

The Enterprise is thrown back in time to 1960s Earth.



, (created by)
0Check in

Watch Now

$0.00 with Prime Instant Video

User Lists

Related lists from IMDb users

a list of 36 titles
created 22 Oct 2011
a list of 46 titles
created 21 Feb 2012
a list of 30 titles
created 19 Aug 2012
a list of 30 titles
created 6 months ago
a list of 80 titles
created 3 months ago

Related Items

Connect with IMDb

Share this Rating

Title: Tomorrow Is Yesterday (26 Jan 1967)

Tomorrow Is Yesterday (26 Jan 1967) on IMDb 7.9/10

Want to share IMDb's rating on your own site? Use the HTML below.

Take The Quiz!

Test your knowledge of Star Trek.
« Previous Episode | 20 of 80 Episodes | Next Episode »





Episode complete credited cast:
Captain John Christopher
Hal Lynch ...
Air Police Sergeant
Dick Merrifield ...
Technician Webb (as Richard Merrifield)
John Winston ...
Mark Dempsey ...
Air Force Captain
Jim Spencer ...
Air Policeman
Sherri Townsend ...
Crew Woman


When the Enterprise is flung back in time while trying to escape the gravitational pull of a black star, they find themselves in orbit around a 1960's Earth. When they are seen by a U.S. Air Force pilot, they beam him aboard but then face the dilemma of what to do with him as he learns more and more about the future. They have to review their initial decision to just keep him when historical records show that his yet-to-be-born son will lead Earth's first successful mission to probe Saturn. Spock devises a plan to do so while also erasing any memory of recent events. Written by garykmcd

Plot Summary | Plot Synopsis


See all certifications »


Official Sites:



Release Date:

26 January 1967 (USA)  »

Company Credits

Show detailed on  »

Technical Specs


Sound Mix:


Aspect Ratio:

1.33 : 1
See  »

Did You Know?


Captain Kirk says the first moon shot was in the late 1960s. This was the first prediction of the correct decade of this accomplishment in a major science fiction work. Previous motion pictures and television series put the first lunar mission sometime in the 1970s at the earliest. See more »


The Enterprise is shown orbiting 1960s Earth. If you look at the shot of Earth, the continents appear to be backwards. See more »


[first lines]
Technician Webb: Captain?
Air Force Captain: What is it, Webb?
Technician Webb: A blip, sir. Just came on the screen.
Air Force Captain: How do you read it?
Technician Webb: Aircraft of some sort. By the size of it and the speed, it's not one of ours, sir. Doesn't even read like anything I've ever seen.
Air Force Captain: What was the approach?
Technician Webb: None, sir. It was just there, like it fell out of the sky or something.
See more »


Featured in The Outside Man (1972) See more »

Frequently Asked Questions

This FAQ is empty. Add the first question.

User Reviews

Back to the '60s
7 July 2009 | by (Italy) – See all my reviews

Tomorrow Is Yesterday introduces the most classic of Star Trek plot devices: time travel. After the original series, it was also used in the spin-offs (minus prequel show Enterprise) and three of the eleven - so far - Trek movies (The Voyage Home, First Contact and J.J. Abrams' reboot), always to great effect. This episode is no exception, especially as it gets more fun to watch as time goes by.

The travel itself is actually just an accident: when a mission goes wrong and hostilities ensue, the Enterprise flies towards the Sun and then away from it as quickly as possible. This, the so-called "slingshot effect", causes the ship to end up orbiting Earth - in the late 1960s! Unfortunately, a pilot working for NASA notices the ship and is taken the hostage by Kirk and Spock, who must now come up with a way to get back home without altering the course of history.

The usual elements of every good time travel story are all present: the discovery of a new age, the problems that derive from it and, of course, the discussions regarding possible paradoxes. What really makes the episode stand out, though, is its sense of fun and prescience: ordinary people's reaction to the sight of Kirk and Spock is always a joy to behold, and it's pretty funny to hear our heroes mention man's first landing on the Moon as taking place on a Wednesday at the end of the '60s: they got it right, weekday and all, a full two years before the whole thing happened. Ah, the pleasures of good sci-fi...

5 of 8 people found this review helpful.  Was this review helpful to you?

Message Boards

Recent Posts
Where do you start? Erdago
Things that bugged you when you watched as a kid flashgordan
William Shatner as Captain Kirk, A++ gavbrown01
Why "What Little Girls Are Made Of" is such a great ep gavbrown01
Wink of an Eye: a particularly good ep gavbrown01
What does it say about this show that people are still talking about it? gavbrown01
Discuss Tomorrow Is Yesterday (1967) on the IMDb message boards »

Contribute to This Page

Create a character page for: