Dr. John Basso
Les Tremayne
Doreena
Pat Delaney
Singer
Scotty McKay
Capt. Theodore Dell
Aron Kincaid
Sam Crane
Neil Fletcher
Mrs. Crane
Annabelle Weenick
Nick
Ron Scott
Lt. Blake
Roger Ready
Lynn Crane
Suzanne Roy
Investigating Psychiatrist / The Creature
Byron Lord
Investigating Psychiatrist
Barnett Shaw
Screenplay
Tony Huston
Director
Larry Buchanan
Producer
Director of Photography
Robert C. Jessup
Associate Producer
Edwin Tobolowsky
Special Effects
Jack Bennett
Gaffer
Robert Dracup
Production Coordinator
Joreta C. Cherry
Music
Ronald Stein
Assistant Director