Leonard Nimoy, Star Trek TOS, "All Our Yesterdays," 1969
Star Trek (The Original Series)
Season 3, Episode 23, "All Our Yesterdays"
Original U.S. broadcast date: March 14, 1969
Synopsis, via IMDb:
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.
Guest stars in this episode included Mariette Hartley (b. June 21, 1940), Ian Wolfe (November 4, 1896 - January 23, 1992), and Kermit Murdock (March 20, 1908 - Februrary 11, 1981).
Some trivia about this episode, via IMDb:
Part of the set depicting the surface of the ice age planet where Spock & McCoy are transported was recycled from the MGM film 'Ice Station Zebra,' made the previous year.
The title is taken from "Macbeth" by William Shakespeare, Act 5, Scene 5: The title character speaks "Tomorrow, and tomorrow, and tomorrow, / Creeps in this petty pace from day to day / To the last syllable of recorded time, / And all our yesterdays have lighted fools / The way to dusty death."
This is the only episode of Star Trek not to feature any scenes set aboard the Enterprise. George Takei, Nichelle Nichols, and Walter Koenig do not appear in this episode. James Doohan does not appear on screen, but has several voice-over lines. In no other episode are only three regular members of the crew seen in person.
Mariette Hartley (Zarabeth) was not allowed to show her belly-button in this episode, despite the appearances of other navels in previous episodes. To comment on this censorship, Gene Roddenberry gave Hartley's character two navels in his pilot, "Genesis II," stating that "the network owed me one."
The Atavachron computer used by Mr. Atoz is the same one as used by Gary Seven in Star Trek: Assignment: Earth (1968).
When Spock tries to use his phaser to warm a boulder at the base of the ice cliff, it doesn't work - presumably because phasers didn't exist in that time period. But, when he lays McCoy out in Zarabeth's cave and examines him, the doctor's medical tricorder seems to work just fine.
The stock footage showing the endless snow fields on the disc McCoy watches was also used as the surface of Exo III in "What Are Little Girls Made Of?".
Virtuoso jazz fusion guitar legend Alan Holdsworth, a big Trek fan, has an album released in 1986 named "Atavachron." One of the tracks is called "All Our Yesterdays." The cover art features Allan in Star Trek uniform.
The sound effect used for the Atavachron is the experimental time code broadcast by radio stations WWV and WWVH in the 1960s. A time code seems appropriate for a time machine.
The name of the librarian Mr. Atoz is a play on the phrase "A to Z." Author Jean Lisette Aroeste was a UCLA librarian at the time she wrote this script.
According to the stardate this episode is chronologically the last of the series, even though its production number and air date are earlier than "Turnabout Intruder." This is, therefore, the last voyage of the USS Enterprise in the original series. This is also the last time travel episode of the original series.
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