| "The Changeling" | |
|---|---|
| Star Trek: The Original Series episode | |
| Episode no. | Season 2 Episode 3 |
| Directed by | Marc Daniels |
| Written by | John Meredyth Lucas |
| Featured music | Fred Steiner |
| Cinematography by | Jerry Finnerman |
| Production code | 037 |
| Original air date | September 29, 1967 |
| Guest appearances | |
| |
"The Changeling" is the third episode of the second season of the American science fiction television series Star Trek. Written by John Meredyth Lucas and directed by Marc Daniels, it was first broadcast on September 29, 1967.
The crew of the USS Enterprise deals with a life-destroying space probe originally launched from Earth. The plot contains similarities to the later 1979 Star Trek film.[1]