Robert Stack as Owen Pentecost

Virginia Mayo as Ann Merry Alaine

Ruth Roman as Boston Grant

Alex Nicol as Captain Stephen Kirby

Raymond Burr as Jumbo Means

Leo Gordon as Zeff Masterson

Regis Toomey as Father Murphy

Carleton Young as Col. Gibson

Donald MacDonald as Gary John Lawford

Kermit Maynard as Southern Sympathizer (uncredited)

Paul McGuire as Saloon Waiter (uncredited)

Burt Mustin as Doctor (uncredited)

Cap Somers as Miner (uncredited)

Dan White as Rogers (uncredited)

Lane Chandler as Northern Loyalist (uncredited)

Ben Corbett as Townsman (uncredited)

Duke Fishman as Miner (uncredited)

Al Haskell as Barfly (uncredited)

Jack Kenny as Barfly (uncredited)

Mitchell Kowall as Mower - Norther Loyalist (uncredited)

Pierce Lyden as Cowboy (uncredited)

Frank Mills as Barfly (uncredited)

Dennis Moore as Townsman (uncredited)

William Phipps as Ralston (uncredited)

Robert Robinson as Bartender (uncredited)

Buddy Roosevelt as Barfly (uncredited)

Syd Saylor as Stagecoach Driver (uncredited)

Sailor Vincent as Barfly (uncredited)

George D. Wallace as Jack Lawford (uncredited)

Peter Whitney as Phil the Cannibal (uncredited)