Dr. Brett Young
Madeline Brenner (as Marta Toren)
Cmdr. Eric von Molter
Lt. Heldman
Dr. Adolph Guernitz
Carla von Molter (as Jacqueline Dalya Hilliard)
Bruno
Mrs. Weber (as Katharine Warren)
Captain Elliott
Kramer
Stefan (as Ralph Brooke)
Hartwig
Crew Member
Belgrana Hospital Orderly (uncredited)
Commodore (voice) (uncredited)
Yacht Captain (uncredited)
Mr. Hagen (uncredited)
Wireless Operator (uncredited)
Navy Lieutenant (uncredited)
Admiral (uncredited)
Asst. U.S. Atty. Paul Rodgers (uncredited)
Jenkins (uncredited)
Radio Operator (uncredited)
North Star Captain (uncredited)