James Warwick

as Scott (1 episode)

as Maitre d'

as Log of HMS Challenger (voice)

as Severn Driscoll (1 episode)

as Prince Namor/Professor (voice) (1 episode), as Xanthus (voice) (1 episode), as Sam Jaggers/Salesman/Swat Cop (voice) (1 episode)

as Century (voice) (13 episodes)

as Matthew Duffin (1 episode)

as Van De Merve

as Lord Clive Ludlow (1 episode)

as Geoffrey Silberston (1 episode)

as Paul Lafferty (2 episodes)

as Tommy

as Tommy Beresford (11 episodes)

as Scott

as Paul Greenfield (4 episodes)

as Jack Lefevre (1 episode)

as Michael Gaffikin

as Michael Gaffikin (4 episodes)

as Jimmy Thesiger

as Bobby Jones

as Dr Scott (1 episode)

as Seymour (1 episode)

as Dan Walters (6 episodes)