James Mason
Self - Host / Captain Vialez

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

Walter Coy
/ Paul Hunter / Comm. Fred Eggly / Corton / Capt. Phillips / Haven / Warden Car...

John Bryant
Lt. Lyle Smith / Robert / Pete / Lt. Harry Ryan / Patrolman Kenny / Paul Chalmer...

Diana Lynn
/ Bonnie Brewster

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

Arthur Franz
/ Steve Jordan / Chris Grine / Chris Mather / Sgt. Douglas Renfrew / Larry Flem...

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

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

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

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

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

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

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

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

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

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

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

Vincent Price
/ Narrator / Wendell Bensen / Swede / An Artist / Baron Laval aka Aristide Pujo...

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