A decoding expert tangles with enemy spies.
William Powell
as Lt. William 'Bill' Gordon / Anson Meridan
Rosalind Russell
as Joel Carter
Binnie Barnes
as Olivia Karloff
Lionel Atwill
as Maj. William Brennan
Cesar Romero
as Capt. Nicholas 'Nikki' Nieterstein
Samuel S. Hinds
as John Carter, Assistant Secretary of War
Henry Stephenson
as Russian Ambassador Gregory
Frank Reicher
as Dr. R.A. Jackson
Charley Grapewin
as Prof. Martin
Leonard Mudie
as Roberts
Howard Hickman
as G-Man
Charles Trowbridge
as Secretary of War Baker