John Loder as Don Rainsford

Audrey Long as Ellen Trowbridge

Edgar Barrier as Erich Kreiger

Russell Wade as Robert Trowbridge

Russell Hicks as Mr. Whitney

Jason Robards Sr. as Captain

Gene Roth as Pleshke

Noble Johnson as Carib

Robert Clarke as Helmsman

James Dime as Bulgar

Edmund Glover as Quartermaster

Jimmy Jordan as Steward

Victor Romito as Mongol

Larry Wheat as (uncredited)

Bruce Edwards as Collins