John Agar
饰 Prof. Clete Ferguson
Lori Nelson
饰 Helen Dobson
John Bromfield
饰 Joe Hayes
Nestor Paiva
饰 Captain Lucas
Grandon Rhodes
饰 Jackson Foster
Dave Willock
饰 Lou Gibson
罗伯特·B·威廉姆斯
饰 George Johnson
Charles Cane
饰 Police Captain
Loretta Agar
饰 Woman on Boat (uncredited)
比尔·鲍德温
饰 Patrol Boat Dispatcher (voice / uncredited)
Jere Beery
饰 Photographer (uncredited)
Ricou Browning
饰 The Gill Man (in water) / Lab Technician (uncredited)
Diane DeLaire
饰 Miss Abbott (uncredited)
Mike Doyle
饰 Cop (uncredited)
克林特·伊斯特伍德
饰 Jennings (uncredited)
Jack Gargan
饰 Skipper (uncredited)
Charles Gibb
饰 Cop (uncredited)
布雷特·加伦特
饰 Pete (uncredited)
Don C. Harvey
饰 Mac - Spotlight Party Leader (uncredited)
Tom Hennesy
饰 The Gill Man (on land) / Marineland Diver (uncredited)
