| "Charlie X" | |
|---|---|
| Star Trek: The Original Series episode | |
| Episode no. | Season 1 Episode 2 |
| Directed by | Lawrence Dobkin |
| Story by | Gene Roddenberry |
| Teleplay by | Dorothy C. Fontana |
| Featured music | Fred Steiner |
| Cinematography by | Jerry Finnerman |
| Production code | 8 |
| Original air date | September 15, 1966 |
| Guest appearances | |
| |
"Charlie X" is the second episode of the first season of the American science fiction television series Star Trek. Written by Dorothy C. Fontana from a story by Gene Roddenberry, and directed by Lawrence Dobkin, it first aired on September 15, 1966.
In the episode, the Enterprise picks up an unstable 17-year-old boy who spent 14 years alone on a deserted planet and lacks the training and restraint to handle his superhuman mental powers wisely.