Tallulah Bankhead

Diana Sturm

Gary Cooper

Lt. Sempter

Charles Laughton

Cmdr. Charles Sturm

Cary Grant

Lt. Jaeckel

Paul Porcasi

Hassan

Juliette Compton

Mrs. Planet

Henry Kolker

Hutton

Dorothy Christy

Mrs. Crimp

Arthur Hoyt

Mr. Planet

Gordon Westcott

Lt. Toll

James Dugan

Condover

Peter Brocco

Wireless Operator (uncredited)

Jack Gardner

Submarine Crewman (uncredited)

John George

Man in Crowd (uncredited)

Henry Guttman

Submarine Crewman (uncredited)

Marion Gering