James Mason
Self - Host / Captain Vialez

John Doucette
/ Matt Kovacs / Chuck Nolan / Fallon / Jim Tally / Bouclet / Capt. Jerry Comsto...

John Bryant
Pete / Paul Chalmers / Sam Gates / Lt. Lyle Smith / Robert / Lt. Harry Ryan / Pa...

Diana Lynn
/ Bonnie Brewster

John Ireland
/ Andrew Evans / Jim Regan / Billy Bob Jackson / Pete Bronson

Arthur Franz
/ Sgt. Douglas Renfrew / Chris Grine / Larry Fleming / Chris Mather / Steve Jor...

Barbara Billingsley
/ Ruth Curtis / Olivia Bryant / Clare Gibney / Ellen

Skip Homeier
Paddy / Zakka / Stretch / Dick Newton / Mark Norton / Slim Haskell

Margaret Field
Renee Beddoe / Laura Warren / / Carla / Denise / Lola

Hayden Rorke
/ Albert Cook / John Whitlock / Pastor Thompson / Brian Levering

Scott Brady
/ Shotgun Slade / Officer Jim Kovacs / Reno Cromwell / Calvin Penny

Katherine Warren
/ Miss Dennis - Teacher / Mrs. Gunther / Louise

Edmond O'Brien
/ Rick Saunders / Capt. Simpson / Jim Reardon

Paul Brinegar
/ Joe / Cousin Obie (uncredited) / Link / Brown

Phyllis Avery
/ Betty Matthews / Susan Kerney / Mrs. McNulty

Richard Carlson
/ Kelly McCall / Josef Lindquist / Alan Mitchell / Lawrence 'Larry' Cameron

Hans Conried
/ Professor / Warren Fitzjerner / Emory Caldwell / Professor Greentree

Vincent Price
/ Narrator / Wendell Bensen / An Artist / Baron Laval aka Aristide Pujol / Swed...

Stephen McNally
Pvt. Earl Webb / Tom Novak / Frank Dyson / Police Chief Dan Grabow / Lt. Al Merr...

Paul Langton
Mal Martin / Landry / Stacey Harris / Cochran / Pete Hunter