as Herbert Thornhill
as Basil Demarest
as Captain Amos Karnes
as The Bronco Kid, alias of Drury
as Weaver
as Lieutenant Patten
as Utah Becker
as Tony
as Durkin
as Prof. Hobart Zorn
as Manning
as First Mate (uncredited)
as Karlotti
as Gangster at Lodge Wanting to Quit (uncredited)
as Carson
as Kimble
as Lt. Patten
as Bertram Van Twiller
as Stevens, gang chemist
as A.R. McCrae
as Laughing Maxey
as Army Officer
as Repen
as Ed Wilder
as Murdock
as Walton
as 'Dapper Bill' Ballard
as Jim Thorne
as Pete Stenner
as Luther Spence
as Henchman Ace Barko
as Ramsey Kane
as Major Jenkins
as Henry Jethrow
as Hawk Miller
as Freighter Mate [Chs. 7-8]
as Lieut. Douglas Thompson
as (uncredited)
as Doane
as Lord Argo
as Kincaid
as Julie's Kidnapper (uncredited)
as Tracy
as Joe
as "Trigger" Stratton
as Willie Durant aka Robert Wallace
as Benson
as Lawrence Mayfield (uncredited)
as Nick Grindell
as Wallace
as Wyman
as Willy St. John
as George
as John Evans
as Kirby
as Van
as Fight Announcer
as Porter
as Jim Dawson
as Argo
as Bob Russell
as Bob Arnold
as Capt. Carlisle Pemberton
as Lord Markham (uncredited)
as John Bland
as Tarnak
as Nicholay
as Judson Ward
as Hatch Engall
as 'Poker' Wilson
as Rowdy Townsman (uncredited)
as Bobby Ralston
as 'Lucky'Jim Seymour
as Henry DeLong
as Dr. Gordon White
as Roger Bradley
as Mile-Away-Harry
as Joe Heller / Lew Heller (uncredited)
as Wheeler
as Director
as Steve
as Stephen Hartley
as Sam
as Blackie Miller
as Jim Murray
as Duke Foster
as Eddie 'Mile-Away' Skeeter Carlson
as Moreland
as Jim Fremont
as Manny
as Fred Burns
as Weary
as Hardy
as Sheriff Clem Norton
as Kerrigan
as Ace Morgan
as Chief Swift Wing
as Alex Ballard
as Dreamer
as Panther Fielding
as 'Lucky' Wilder
as Cmdr. Lawson
as Real Montgomery Irving
as Peter Burke
as Delmar Spavinaw
as Concho
as Shotgun Jones
as Bourbon Drinker on Train
as John Ritter
as Brady
as Toledo Eddie Marchetti
as Mike Corney
as Gregory Stone
as Abbott
as Detective
as Philip Wells
as Burr Gordon
as Dr. Jack Martin - the Man in the Case
as Anton Lebau
as Manager
as Brophy
as Duval
as Holt Norbo - Bank Cashier
as Slippy McGee
as Shanghai Morgan
as Jack Raymond
as The captain
as Poe Powers
as Jo Sprague
as Kurt Walters
as Dick Randall
as The Revenue Officer
as Etienne Cloquet
as Scruff Mackenzie
