Gerald Pring

as Doctor

as Mr. Wilson

as Sir Horace Cranston

as Wilkins

as Henry Stuart

as Capt. O'Callaghan

as Henry Taylor

as Cadbury Todd II

as Holt Langdon

as Reginald Stanhope

as Charles Merchant

as Capt. Darrington

as Sam Padgett

as Gentleman George

as Albert Waton

as Captain Falconer

as Ned Pym / Lord Monkhurst / Young Lord Monkhurst