| "Yesteryear" | |
|---|---|
| Star Trek: The Animated Series episode | |
| Episode no. | Season 1 Episode 2 |
| Directed by | Hal Sutherland |
| Written by | D. C. Fontana |
| Production code | 22003 |
| Original air date | September 15, 1973 |
| Guest appearances | |
| |
"Yesteryear" is the second episode of the first season of the animated American science fiction television series Star Trek: The Animated Series. It first aired in the NBC Saturday morning lineup on September 15, 1973, and was written by veteran Star Trek writer D. C. Fontana.[note 1] Widely regarded as one of the best episodes of the series, it was nominated for a Daytime Emmy Award. "Yesteryear" guest-starred Mark Lenard in the role of Spock's father, Sarek.
In this episode, Enterprise First Officer Spock must travel in time to his childhood and keep his younger self from dying and being replaced by an Andorian on his ship.
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