Lt. William 'Bill' Gordon / Anson Meridan

Joel Carter

Olivia Karloff

Maj. William Brennan

Capt. Nicholas 'Nikki' Nieterstein

John Carter, Assistant Secretary of War

Russian Ambassador Gregory

Dr. R.A. Jackson

Prof. Martin

Roberts

G-Man

Secretary of War Baker

de Segroff

Mrs. Hendricks (uncredited)

Lady Cavendish (uncredited)

Agent Patrick O'Reilly (uncredited)

Bobbie Burns (uncredited)

Chaplain (uncredited)

De Segroff's Associate (uncredited)

Carter's Aide (uncredited)

Desk Clerk Assistant (uncredited)

Recruiter (uncredited)

Jackson's Assistant (uncredited)

1st Military Policeman (uncredited)

2st Military Policeman (uncredited)

German Torpedo Man (uncredited)

Taxi Driver (uncredited)

Hotel Desk Clerk (uncredited)

Country Boy (uncredited)

Doorman (uncredited)

Radio Operator (uncredited)

Colonel Petroff (uncredited)

Gardner (uncredited)

2nd Lieutenant (uncredited)

Customs Officer in Mexico (uncredited)

Mexican (uncredited)

Mexican (uncredited)

Decoder (uncredited)

Orderly (uncredited)

Orderly (uncredited)

Orderly (uncredited)

Sailor (uncredited)

Partitioner (uncredited)

Carter's Receptionist (uncredited)

Code Room Clerk (uncredited)

Code Room Clerk (uncredited)

Man in Code Room (uncredited)

Cashier (uncredited)

German-Speaking Bellhop (uncredited)

Boris Stronskoff - Russian Singer (uncredited)

Café Doorman (uncredited)

Officer (uncredited)

G-Man (uncredited)

Kaieneff (uncredited)

Ship's Captain (uncredited)

Diplomat (uncredited)

Tailor (uncredited)

Private (uncredited)

Sergeant (uncredited)

Army Officer (uncredited)

Butler (uncredited)

Pvt. Dean (uncredited)

Red Cross Nurse (uncredited)

Kesterman (uncredited)

G-Man (uncredited)

Telegrapher (uncredited)

Barber (uncredited)

Drug Store Clerk (uncredited)