| Name | Source | Type | |
|---|---|---|---|
| Star Trek | |||
| Robert J. Sawyer's Starplex | |||
| Greg Egan's Diaspora | |||
| Wankh | Jack Vance's Planet of Adventure series | Black frog-like humanoids | |
| Warren Ampersand | Adventure Time | An alien can shape-shift, it has midnight blue in color when young and grey-blue; Jake the Dog's mechanical parent | |
| Waterseekers | Red Planet | ||
| Doctor Who | Statue-like humanoid | ||
| Torchwood | Humanoid | ||
| Willis the Bouncer | Red Planet | ||
| Winathians | |||
| Doctor Who | |||
| Wisps | Sonic the Hedgehog | Squid-like creatures of various shapes and colors | |
| Star Trek | |||
| Wolfweeds | Doctor Who | ||
| Wookiees | Star Wars | Humanoid | |
| Stargate | The wraith looks like a human; the difference is the grey skin, the long hair of all of them, and some little holes in the face. | ||
| Marathon Trilogy |