Lieutenant Patten
Prof. Hobart Zorn
Joe Heller / Lew Heller (uncredited)
Bourbon Drinker on Train
Jim Murray (archive footage)
Captain Amos Karnes
Detective
Fight Announcer
Henchman Ace Barko
Brady
Tony
Freighter Mate [Chs. 7-8]
Army Officer
"Trigger" Stratton
Kimble
Gregory Stone
Fred Burns
Manning
John Ritter
Carson
Lt. Patten
Jim Dawson
Wallace
Weaver
Blackie Miller
Stevens, gang chemist
Jim Murray
Karlotti
Lieut. Douglas Thompson
'Lucky' Wilder
Kincaid
Ace Morgan
Bob Arnold
Durkin
Walton
Murdock
Julie's Kidnapper (uncredited)
Cmdr. Lawson
Henry DeLong
Panther Fielding
Gangster at Lodge Wanting to Quit (uncredited)
Duke Foster
Lord Argo
Jim Thorne
Inspector A.R. McCrae
Tracy
Henry Jethrow
Kirby (Mary R Mate)
Kirby
Gill Brown, the Horse Owner
Poe Powers
George
Ed Wilder
Sheriff Clem Norton
Laughing Maxey
Major Jenkins
Spike
Nick Grindell
Philip Wells
Roger Bradley
Jim Fremont
Bob Russell
Hatch Engall
Judson Ward
Utah Becker
Shanghai Morgan
Moreland
'Poker' Wilson
Mile-Away-Harry
'Lucky'Jim Seymour
(uncredited)
Steve
Ramsey Kane
Repen
Lawrence Mayfield (uncredited)
Willie Durant aka Robert Wallace
Anton Lebau
Porter
Manager
Nicholay
John Bland
Mike Corney
Hawk Miller
Eddie 'Mile-Away' Skeeter Carlson
The captain
Dr. Gordon White
Kerrigan
John Evans
Jack Raymond
Director
Slippy McGee
Delmar Spavinaw
(uncredited)
Kurt Walters
Dr. Jack Martin - the Man in the Case
'Dapper Bill' Ballard
Capt. Carlisle Pemberton
Paul Armitage
Bobby Ralston
Peter Burke
Stephen Hartley
Burr Gordon
Herbert Thornhill
Bertram Van Twiller
Basil Demarest
Pierre
Wynne Garlan
Chief Swift Wing
Ned Halton
Billy Silver
Willie Clark
Billy McVeigh
The Bronco Kid, alias of Drury
The Revenue Officer
Concho
Real Montgomery Irving
Harold - John Sharon's Wayward Son