| "Return to Tomorrow" | |
|---|---|
| Star Trek: The Original Series episode | |
| Episode no. | Season 2 Episode 20 |
| Directed by | Ralph Senensky |
| Written by | John T. Dugan |
| Featured music | George Duning |
| Cinematography by | Jerry Finnerman |
| Production code | 051 |
| Original air date | February 9, 1968 |
| Guest appearances | |
| |
"Return to Tomorrow" is the twentieth episode of the second season of the American science fiction television series Star Trek. Written by John T. Dugan (under the pen-name "John Kingsbridge") and directed by Ralph Senensky, it was first broadcast February 9, 1968.
In the episode, telepathic aliens take control of Captain Kirk, Dr. Ann Mulhall (Diana Muldaur), and First Officer Spock's bodies in order to construct android hosts.
This episode was the first appearance of Diana Muldaur in the Star Trek franchise. She appeared again as Dr. Miranda Jones in the third season episode, "Is There in Truth No Beauty?" and as Dr. Katherine Pulaski in the second season of Star Trek: The Next Generation.