William Powell (43)

Lt. William 'Bill' Gordon / Anson Meridan

Rosalind Russell (28)

Joel Carter

Binnie Barnes (32)

Olivia Karloff

Lionel Atwill (50)

Maj. William Brennan

Cesar Romero (28)

Capt. Nicholas 'Nikki' Nieterstein

Samuel S. Hinds (60)

John Carter, Assistant Secretary of War

Henry Stephenson (64)

Russian Ambassador Gregory

Frank Reicher (59)

Dr. R.A. Jackson

Charley Grapewin (65)

Prof. Martin

Leonard Mudie (52)

Roberts

Howard Hickman (55)

G-Man

Charles Trowbridge (53)

Secretary of War Baker

Murray Kinnell (46)

de Segroff

Margaret Dumont (53)

Mrs. Hendricks (uncredited)

Mary Forbes (52)

Lady Cavendish (uncredited)

Tom Dugan (46)

Agent Patrick O'Reilly (uncredited)

Bernadene Hayes (23)

Bobbie Burns (uncredited)

Winter Hall (63)

Chaplain (uncredited)

Hedwiga Reicher (51)

De Segroff's Associate (uncredited)

Milburn Stone (31)

Carter's Aide (uncredited)

Theodore von Eltz (41)

Desk Clerk Assistant (uncredited)

Sid Silvers (34)

Recruiter (uncredited)

Sidney Bracey (57)

Jackson's Assistant (uncredited)

Edgar Dearing (42)

1st Military Policeman (uncredited)

James Flavin (29)

2st Military Policeman (uncredited)

Hans Fuerberg

German Torpedo Man (uncredited)

Sterling Holloway (30)

Taxi Driver (uncredited)

William V. Mong (60)

Hotel Desk Clerk (uncredited)

Mickey Rooney (15)

Country Boy (uncredited)

Melville Cooper (39)

Doorman (uncredited)