James Mason
Self - Host / Captain Vialez

John Doucette
/ Capt. Jerry Comstock / Bouclet / Chuck Nolan / Jim Tally / Fallon / Matt Kova...

John Bryant
Lt. Lyle Smith / Robert / Paul Chalmers / Pete / Lt. Harry Ryan / Patrolman Kenn...

Diana Lynn
/ Bonnie Brewster

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

Arthur Franz
/ Chris Grine / Larry Fleming / Chris Mather / Steve Jordan / Sgt. Douglas Renf...

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

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

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

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

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

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

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

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

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

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

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

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

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

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