Richard Greene
Perry Townsend III

Nancy Kelly
Susan Leeds

Preston Foster
Lt. (j.g.) John C. Drake

George Bancroft
Capt. Leeds

Slim Summerville
Ellsworth 'Spuds' Fickett, cook

J. Farrell MacDonald
CWO 'Sails' Quincannon

Warren Hymer
Seaman Rocky Haggerty

Douglas Fowley
Seaman Pinky Brett

Dick Hogan
Seaman Johnny Miller

Elisha Cook Jr.
Seaman Rutherford Davis Pratt, aka 'The Professor'

George E. Stone
Seaman Irving Goldfarb

John Carradine
McAllison

Ward Bond
Seaman Olaf Swanson

Moroni Olsen
The Fleet Captain

Charles Trowbridge
RAdm. Joseph Maitland

Maxie Rosenbloom
Marine Sentry Sgt. Joe Duffy

Joan Valerie
Anne

Henry Armetta
Luigi

Jack Pennick
Bos'un 'Guns' McPeek

Robert Lowery
Sparks, radioman

Harry Strang
Seaman Grainger

Victor Varconi
Italian Naval Chaplain Vanzano

Russ Clark
Undetermined Part (script name, Anderson)

Charles Tannen
Undetermined Part (script name, Kelly)

Ernie Alexander
Warship Sailor

Murray Alper
Orderly in Maitland's Office

Lon Chaney Jr.
Marine Sentry

Dorothy Christy
McPeek's Girl

E. E. Clive

Ray Cooke
Warship Sailor

Alan Davis
Maitland's Secretary-Lieutenant

Duke Green
Warship Sailor

Fred Malatesta
Italian Gendarme at the 'Maria Ann'

Frank Moran
Waiter at Dive

Manuel París
Italian Gendarme at the 'Maria Ann'

Ferdinand Schumann-Heink
German Officer

Dick Wessel
Dock Shore Patrolman (facing camera)