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