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