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