Director
James P. Hogan
DIRECTOR
Writer
Manfred Lee
WRITER
Frederic Dannay
Eric Taylor
Stars (in credits order)
William Gargan
Ellery Queen
Margaret Lindsay
Nikki Porter
Charley Grapewin
Inspector Richard Queen
Gale Sondergaard
Mrs. Van Dorn
Gilbert Roland
Paul Gillette
Sig Ruman
Heinrich - Spy Leader
James Burke
Police Sgt. Velie
Ernst Deutsch
Dr. Morse - Lido Club Physician
Maurice Cass
Mr. Calkus - Museum Owner
Minor Watson
Cmdr. Lang
Felix Basch
Helm - Lido Club Manager
John Hamilton
Bracken - The Police Commissioner
James Seay
Marine Sgt. Stevens
Ludwig Donath
Reece
Dick Wessel
The Big Sailor
Billy Bletcher
The Small Sailor
Willy Castello
Van Dorn Chauffeur (uncredited)
Dorothy Granger
Apartment Tenant (uncredited)
Grace Hayle
Overweight Woman (uncredited)
William Newell
Jack Perrin
Marine (uncredited)
Jack Rice
Railway Ticket Agent (uncredited)
Arthur Space
Lido Club Desk Clerk (uncredited)
Harry Strang
Marine Corporal (uncredited)
Fred 'Snowflake' Toones
Train Porter (uncredited)
Hans Heinrich von Twardowski
Capt. Earhardt (uncredited)
