A spine-tingling psychological thriller dealing with the idea that an animal's intelligence can be heightened when it is injected with human brain tissue. Instead of the animal becoming less savage, it is soon over reacting to every stimuli and goes on a wild killing spree.
- Jason Beghe
- John Pankow
- Kate McNeil
- Boo the Monkey
- Christine Forrest
- Stephen Root
- Stanley Tucci
- Janine Turner
- Joyce Van Patten
- Production Designer: Cletus Anderson
- Costume Designer: Barbara Anderson
- Cinematographer: James A. Contner
- Art Director: James C. Feng
- Editor: Pasquale Buba
- Executive Producer: Peter Grunwald
- Based on a Work by: Jack Alain Leger
- Producer: Charles Evans
- Art Director: J. Mark Harrington
- Associate Producer: Peter R. McIntosh
- Executive Producer: Gerald S. Paonessa
- Director: George A. Romero
- Screenplay: George A. Romero
- Sound : John Sutton
- Set Decorator : Diana Stoughton
- Music Supervisor: David Shire
