Three researchers work on a paleontological project focusing on two dinosaurs: one fictional, the one created by special effects genius Ray Harryhausen for the film The Valley of Gwangi (1969); the other real, the Concavenator corcovatus, whose remains were discovered in 2003 at the Las Hoyas site, in the province of Cuenca (Spain), very close to where the filming took place.
| Actor | Role |
|---|---|
 Dunia RodríguezNot listed | Not listed |
 Elena de LaraNot listed | Not listed |
| MMarian ClarNot listed | Not listed |
 Jack TaylorNot listed | Not listed |
 Colin ArthurSelf - Special Effects Makeup Artist | Self - Special Effects Makeup Artist |
| JJosé Luis SanzSelf - Paleontologist | Self - Paleontologist |