Elaan of Troyius
| "Elaan of Troyius" | |
|---|---|
| Star Trek: The Original Series episode | |
| Episode no. | Season 3 Episode 13 | 
| Directed by | John Meredyth Lucas | 
| Written by | John Meredyth Lucas | 
| Featured music | Fred Steiner | 
| Cinematography by | Jerry Finnerman | 
| Production code | 057 | 
| Original air date | December 20, 1968 | 
| Guest appearances | |
| 
 | |
"Elaan of Troyius" is the thirteenth episode of the third season of the American science fiction television series Star Trek. Written and directed by John Meredyth Lucas, it was first broadcast on December 20, 1968.
In the episode, the Enterprise ferries a spoiled princess whose betrothal, it is hoped, will bring peace to a star system at war.