James Mason
Self - Host / Captain Vialez

John Doucette
/ Jim Tally / Matt Kovacs / Chuck Nolan / Bouclet / Capt. Jerry Comstock / Fall...

Walter Coy
/ Capt. Phillips / Comm. Fred Eggly / Paul Hunter / Corton / Warden Carmody / H...

John Bryant
Tony Savage / Robert / Pete / Patrolman Kenny / Sam Gates / Paul Chalmers / Lt. ...

Diana Lynn
/ Bonnie Brewster

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

Arthur Franz
/ Steve Jordan / Chris Mather / Sgt. Douglas Renfrew / Larry Fleming / Chris Gr...

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

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

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

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

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

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

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

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

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

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

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

Vincent Price
Swede / An Artist / / Baron Laval aka Aristide Pujol / Narrator / Wendell Bense...

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