| "White Tulip" | |
|---|---|
| Fringe episode | |
 Scientist Alistair Peck (Peter Weller) has transformed his body into a personal time machine. | |
| Episode no. | Season 2 Episode 18 |
| Directed by | Thomas Yatsko |
| Written by | J. H. Wyman Jeff Vlaming |
| Production code | 3X5117 |
| Original air date | April 15, 2010 |
| Guest appearances | |
| |
"White Tulip" is the 18th episode of the second season of the American science fiction drama television series Fringe. It follows a scientist (Peter Weller) in his quest to time travel back and save his fiancée, while the Fringe team investigates the consequences of his actions, and Walter (John Noble) struggles to tell his son Peter (Joshua Jackson) he was stolen from the parallel universe as a boy.
The episode was co-written by J.H. Wyman and Jeff Vlaming, and was directed by Thomas Yatsko. Wyman later stressed the importance of "White Tulip" in the show's evolution, calling it a "mythalone" because its elements were designed to create the ideal episode to satisfy both new and hardcore viewers. Elements from this episode, in particular the idea of the white tulip as a sign of forgiveness, would be reused in later episodes.
It first aired in the United States on April 15, 2010 on Fox to an estimated 6.624 million viewers. It received positive reviews, and earned a nomination for Outstanding Sound Editing For A Series at the 62nd Primetime Emmy Awards. It was ranked the best episode of the entire series by Entertainment Weekly, while IGN and Den of Geek ranked it as the second best.