as Tom Sneed

as Stanley Rand

as Corporal (uncredited)

as Roper - Jeff's First Mate [Chs.1-2, 5-8]

as Nick Joel

as Sir Lancelot

as Syndicate Man (uncredited)

as Mr. Long

as Morelli

as Keeler

as RCMP Sergeant Dickson

as Swede (uncredited)

as Federal Man

as Merlin's Chauffeur (uncredited)

as Sir Bedivere (uncredited)

as Roger Bigsby

as Cash Jennings

as Red Robert

as Fenton

as Sheriff Gilchrist

as Patrol Captain

as Fred Mallen

as Seabee (uncredited)

as George Millarde

as Lefty - Henchman [Chs.1-4,7-9]

as Jeff Carson

as Decker - Boss

as Utah Kid

as Charles Bentley

as Lester Ward

as Ed Hammond

as Sheriff Jed Hawkins

as Henchman Lucky Cramer

as Police Capt. Reilly

as Sheriff

as Politician (uncredited)

as Jim Laren

as Unspecified Saboteur

as Mine Boss

as Ship's Purser

as Barrett's Aide

as Paul Radcliffe

as Lieutenant Commander (uncredited)

as Gideon Spillet

as Captain (Uncredited)

as Bruce Carter

as Captain (uncredited)

as Detective

as Ringmaster (uncredited)

as Vic Hardy

as Mounted Cossack Officer

as Captain of Guard (uncredited)