as Jeff Carson
as Decker - Boss
as Cash Jennings
as Gideon Spillet
as Roper - Jeff's First Mate [Chs.1-2, 5-8]
as Sir Bedivere (uncredited)
as Politician (uncredited)
as Federal Man
as Vic Hardy
as Paul Radcliffe
as Mine Boss
as Lefty - Henchman [Chs.1-4,7-9]
as Detective
as Red Robert
as Stanley Rand
as Seabee (uncredited)
as Fred Mallen
as Sheriff
as Jim Laren
as Captain (uncredited)
as Corporal (uncredited)
as Keeler
as Mounted Cossack Officer
as Morelli
as Charles Bentley
as George Millarde
as Barrett's Aide
as Tom Sneed
as Henchman Lucky Cramer
as Lester Ward
as Fenton
as Sheriff Gilchrist
as Bruce Carter
as Swede (uncredited)
as Merlin's Chauffeur (uncredited)
as Unspecified Saboteur
as Police Capt. Reilly
as Utah Kid
as Syndicate Man (uncredited)
as Lieutenant Commander (uncredited)
as Roger Bigsby
as Captain (Uncredited)
as Ringmaster (uncredited)
as Sheriff Jed Hawkins
as Captain of Guard (uncredited)
as Ship's Purser
as Patrol Captain
as Nick Joel
as Mr. Long
as RCMP Sergeant Dickson
as Sir Lancelot
as Ed Hammond
