Martin
Saladin
Leonard Hardingham
Count Renier
Creighton Deane
Henry Lord (as Charles Gerrard)
Mason
French Pete
Lord Leopold Ambrose Plumtree (uncredited)
'Streffy' (Lord Altringham)
Paul Glynn
Cmdr. Weymouth
Bailiff
Vincent Cortez
Major Russett
Martin Tancray
Scott's son
Keith Merwyn (as Charles Gerard)
Karl Wagner
William Gurson, aka 'Will the Weasel'
Capt. Francis Barold
London Tower
Theo Kameneff
Arthur Remsen
DeLeon
Sir Adam Judson
Reggie De Vere
Charles Riddles - Ethel's Lover
Gordon Savage
Mr. Whitman
Walter Harvey
Gibson
Raymond Tyson (as Charles Gerrard)
Van Surdam
Lawrence Topham (as Charles Gerard)
Crook
Steve
Ballard 'Bal' Barrett
John Stewart
Lait Rodman
Sir Peter Dare
Count Polinac
Count Lazlos
Dr. Amersham
Qualters (as Charles Gerard)
Tom Hayden
Ted Conroy
John Harland
Don Alvarez