David Fielding (as Skip Shimer)

Susan Turner

Asmodeus

Jim Hudson (as Frank Boers Jr.)

Vicki (as Robin Snider)

Reporter Sloan (as Jim Phillips)

Dr. Arthur Watermann (as Fritz Leiber)

Doctor Branson

Nurse

Old man in cave

Acting

Acting

The Orderly

Doctor on Tape Recorder (voice) (uncredited)

Detective Harrison (uncredited)

Reporter Sloan (voice) (uncredited)

The Green Giant

Acting

Sound

Acting

Sound

Sound

Sound

Visual Effects

Production

Production

Visual Effects

Visual Effects

Costume & Make-Up

Editing

Visual Effects

Directing

Sound

Visual Effects