Thurman is an orange slug-like creature with three eyes and covered with slime on it's body.
Thurman is one of the sapient spacefaring species native to Zaddlebrok-475. They are identified as one of the 106 races that have sent representatives for peaceful contact to "the Dark Planet" which never returned, due to being captured and held captive in Area 51. They are shown to survive on Earth's environmental conditions with no problems.
- The graph showing a gallery of aliens which went missing on Earth appears to identify the life forms by species (ex: Occulan, Greys) but lists Thurman by name, indicating that this might be the name of his species rather than, or in addition to, his individual name.