as Tom 'Bomber' Brown / Tom Hayes
as Ensign Wright (uncredited)
as Jim Murray
as Curtis Whitman
as Lamont Cranston / The Shadow
as Jack's Friend (uncredited)
as Lieutenant Dick 'Tex' Price
as Richard Cabot
as 1st Admirer
as Joe
as Tom Stone
as Capt. Baker
as Eddie Farrell
as Lt. Wood
as Ralph Percy
as Talgon's Brother - a Martian Captain
as Frank Bradley
as Young Officer at Beer Garden (Uncredited)
as Eddie Condon
as Nifty Morgan
as Elmer Laydon - One of The Four Horsemn
as Jimmy Stafford
as Stratosled Pilot (Talgon's Brother)
as Al Williams
as Logger Paying Doctor (uncredited)
as Lee Davis
as Nick Mantee
as Reggie (uncredited)
as Don Shawhan
as Sgt. Cummings
as Sergei
as Mason
as Detective (uncredited)
as Sam Wire
as Alan Armstrong / Jack Armstrong
as Party Guest (Uncredited)
as Student
as Mike Samo
as Dallas
as Bruce Gordon
as Tom Marlin
as Jerry Carter
as Party Guest (uncredited)
as Bob Moore
as Ray
as Paulie Mitchell
as Stanley Lowell
as Matt Hibbard
as Hal Rogers
as Lawrence 'Larry' Deering
as (archive footage)
as Party Guest
as Jerry Devery
as Robert "Bob" Eller
as Steve Randall
as Jim Marsden
as Alan Armstrong / Spy Smasher / Jack Armstrong
as Frank Martin
as Steve-Detective
as Paul Conrad
as Bradley (uncredited)
as NWMP Cpl. Jerry Hale
as Tex Hanlon
as Brick Bradford
as Jack Hall
as Alan Davis
as Jim Morgan
as J.W. 'Jack' Keaton, Jr.
as Clay Harrison
as Joe MacIntyre
as Jack
as Bob, college boy at club
as Adam Dyer
as Lieutenant Wilbur Allister
as Lt. Larry Farrell
as Cliff Mallory
as Alex Anderson
as Dale Wentworth
