Walter Pidgeon
Nicholas 'Nick' Carter, aka Robert Chalmers
Rita Johnson
Lou Farnsby
Henry Hull
John A. Keller
Stanley Ridges
Doctor Frankton (as Stanley C. Ridges)
Donald Meek
Bartholomew, the bee man
Addison Richards
Streeter - President of Radex
Henry Victor
Hammil - tall spy boss
Milburn Stone
Krebs - 2d hurt worker
Martin Kosleck
Otto - 3d hurt worker
Frank Faylen
Pete Foley - 1st pilot
Sterling Holloway
Bartholomew's Bee Asst.
Wally Maher
Cliff Parsons - Keller's Pilot & Asst.
Edgar Dearing
Harbor Patrol Sgt. Denny
Ernie Alexander
Factory Workman
Louis V. Arco
Yacht Captain
Frank Ball
Peake the Gardener
Don Brodie
Engel - X-49 Workman
Don Castle
Ed - 1st Hurt Worker
Eddy Chandler
Joe - Blueprint Security Officer
Gene Coogan
Welder
Paul Ellis
Faber - Henchman
Bud Geary
Seaman on Yacht
Chuck Hamilton
Entrance Guard
Edward Hearn
Deputy
Kenner G. Kemp
Student
William Lally
Exit Guard
Richard Lane
Sam Vaughn
Carey Loftin
Minor Role
Wilfred Lucas
Police Detective Randall
Joseph P. Mack
Draughtsman
George Meeker
Hartley
Roger Moore
Streeter's Secretary
William Newell
Taxi Driver
Gil Perkins
Factory Workman
Lee Phelps
Riley - Airplane Workman
Lee Prather
Police Captain
Charles Sherlock
Keller's Driver
Harry Templeton
Police Driver
Richard Terry
Cain - Henchman
Andrew Tombes
Robinson
Harry Tyler
Locker Room Attendant
Charles Flynn
Factory Workman
Bertram Millhauser
Story
Jacques Tourneur
Director
Harold Buckley
Story
Bertram Millhauser
Screenplay
Edward Ward
Original Music Composer
Cedric Gibbons
Art Direction
Lucien Hubbard
Producer
Edwin B. Willis
Set Decoration
Charles Lawton Jr.
Director of Photography
Douglas Shearer
Sound
Carey Loftin
Stunts
Daniele Amfitheatrof
Original Music Composer
Elmo Veron
Editor
Jerry Bresler
Unit Manager
Sandy Roth
Assistant Director
Leo Arnaud
Orchestrator