Star Trek (1966–1969)
28 user 7 critic

All Our Yesterdays 

0:59 | Trailer
When Kirk, Spock and McCoy investigate the disappearance of a doomed planet's population, they find themselves trapped in different periods of that world's past.


Marvin J. Chomsky (as Marvin Chomsky)


Gene Roddenberry (created by), Jean Lisette Aroeste | 1 more credit »





Episode complete credited cast:
William Shatner ... Capt. Kirk
Leonard Nimoy ... Mr. Spock
DeForest Kelley ... Dr. McCoy
Mariette Hartley ... Zarabeth
Ian Wolfe ... Mr. Atoz
Kermit Murdock ... The Prosecutor
Ed Bakey Ed Bakey ... The First Fop
James Doohan ... Scott (voice)
Anna Karen Anna Karen ... Woman
Albert Cavens Albert Cavens ... Second Fop (as Al Cavens)
Stan Barrett Stan Barrett ... The Jailor
Johnny Haymer ... The Constable


When the planet Sarpeidon is about to be destroyed, by its star Beta Niobe becoming a supernova, Kirk (William Shatner), Spock (Leonard Nimoy) and McCoy (DeForest Kelley) beam down and find it evacuated except for its librarian, Mr. Atoz (Ian Wolfe), tending to his replicas. They are a collection of unusual discs, which play the planet's history and (to their surprise) allow their users to travel into the past through the atavachron, a time machine, into the periods each was studying on disc. The crew travels unprepared, McCoy and Spock find themselves locked in a frozen ice age 5,000 years ago, where Spock reverts to the barbaric age of the Vulcans. He becomes very easily agitated, and is intensely attracted to the political prisoner Zarabeth (Mariette Hartley), who enjoys getting company but tells them return is impossible. Kirk arrives in a Cromwellian period, where he's arrested and suspected of witchcraft. He soon realizes the magistrate must be a time traveler like him, and ... Written by KGF Vissers

Plot Summary | Add Synopsis


TV-PG | See all certifications »


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Release Date:

14 March 1969 (USA) See more »

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Did You Know?


The Atavachron computer used by Mr. Atoz is the same one as used by Gary Seven in Star Trek: Assignment: Earth (1968). See more »


When Spock & McCoy return to the library, Spock says Zarabeth has been dead and buried for 5000 years. If she was alone in that time period, who buried her? Her cave was near an ice cliff - presumably the leading edge of a glacier. Over 5,000 years, Zarabeth would have been buried by ice, then sediment from runoff from the receding glacier. So not "buried" in the societal sense, but archaeologically accurate. She may actually have wound up in a museum somewhere on Sarpeidon. See more »


Woman: [to Kirk] Witch! Witch! Witch! They'll burn ya!
See more »

Alternate Versions

Special Enhanced version Digitally Remastered with new exterior shots and remade opening theme song See more »


Referenced in Star Trek: Discovery: The Vulcan Hello (2017) See more »

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User Reviews

a very good episode of season 3
8 September 2007 | by fabian5See all my reviews

The penultimate episode of Star Trek's third season is excellent and a highlight of the much maligned final season. Essentially, Spock, McCoy and Kirk beam down to Sarpeidon to find the planet's population completely missing except for the presence of a giant library and Mr. Atoz, the librarian. All 3 Trek characters soon accidentally walk into a time travel machine into different periods of Sarpeidon's past. Spock gives a convincing performance as an Ice Age Vulcan who falls in love for Zarabeth while Kirk reprises his unhappy experience with time travel--see the 'City on the Edge of Forever'--when he is accused of witchcraft and jailed before escaping and finding the doorway back in time to Sarpeidon's present. In the end, all 3 Trek characters are saved mere minutes before the Beta Niobe star around Sarpeidon goes supernova. The Enterprise warps away just as the star explodes.

Ironically, as William Shatner notes in his book "Star Trek Memories," this show was the source of some dispute since Leonard Nimoy noticed that no reason was given in Lisette's script for the reason why Spock was behaving in such an emotional way. Nimoy relayed his misgivings here directly to the show's executive producer, Fred Freiberger, that Vulcans weren't supposed to fall in love. (p.272) However, Freiberger reasoned, the ice age setting allowed Spock to experience emotions since this was a time when Vulcans still had not evolved into their completely logical present state. This was a great example of improvisation on Freiberger's part to save a script which was far above average for this particular episode. While Shatner notes that the decline in script quality for the third season hurt Spock artistically since his character was forced to bray like a donkey in "Plato's Stepchildren," play music with Hippies in "the Way to Eden" or sometimes display emotion, the script here was more believable. Spock's acting here was excellent as Freiberger candidly admitted to Shatner. (p.272) The only obvious plot hole is the fact that since both Spock and McCoy travelled thousands of years back in time, McCoy too should have reverted to a more primitive human state, not just Spock. But this is a forgivable error considering the poor quality of many other season 3 shows, the brilliant Spock/McCoy performance and the originality of this script. Who could have imagined that the present inhabitants of Sarpeidon would escape their doomed planet's fate by travelling into their past? This is certainly what we came to expect from the best of 'Classic Trek'--a genuinely inspired story.

Shatner, in 'Memories', named some of his best "unusual and high quality shows" of season 3 as The Enterprise Incident, Day of the Dove, Is there in Truth no Beauty, The Tholian Web, And the children Shall Lead and The Paradise Syndrome. (p.273) While my personal opinion is that 'And the children Shall Lead' is a very poor episode while 'Is there in Truth no Beauty' is problematic, "All Our Yesterdays" certainly belongs on the list of top season three Star Trek TOS films. I give a 9 out of 10 for 'All Our Yesterdays.'

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