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