William Kerwin

as Fred Walsh

as Doctor Denny

as Self

as Edward

as Anthony

as Max McClain

as Suburbanite

as Paul

as Boa Man (as Rooney Kerwin)

as Walker

as Doctor Parker (uncredited)

as Professor Reeve (uncredited)

as Claude Benson

as Harry Richardson

as Sheriff Ben Williams

as Dr. George Bana

as Homer

as Detective Tom Garrett

as Old Man

as Monroe

as Alfred

as Soldier

as Earl

as Speedboat Owner

as Rex

as Russell Donovan (uncredited)

as Lester (uncredited)

as Burke (uncredited)

as Policeman

as Detective (as Thomas Wood)

as Steve Bradford

as Mr. Sullivan

as FBI Man #1

as Nudist (uncredited)

as Marty Conley (as Thomas Wood)

as Jeff

as Ralph Higbee

as Bill

as Dr. Hank Tyson (as Thomas Wood)

as Roland Harcourt

as Man Mowing Lawn (uncredited)

as Tentor

as Tom White

as Harmon Johnson

as Rick Bradshaw

as Tommy Sweetwood

as Detective Pete Thornton

as Al Harding

as The Plumber

as Mark (uncredited)

as Matthew

as Sea Captain

as Bart

as Steve Matthews

as Jack Norwall

as Joe

as Michael

as Gary

as Husband

as Cole

as Gene

as Tony

as Larry