| Cast | Jon Pertwee (as The Doctor), Katy Manning (as Jo Grant), Nicholas Courtney (as Brigadier Lethbridge-Stewart), Richard Franklin (2) (as Captain Mike Yates), John Levene (as Sergeant Benton), Roger Delgado (as The Master), Fernanda Marlowe (as Corporal Bell), Patrick Godfrey (as Major Cosworth), Simon Lack (as Kettering), Pik-Sen Lim (as Chin Lee), Kristopher Kum (as Fu Peng), Tommy Duggan (as Senator Alcott), Raymond Westwell (as Prison Governor), Michael Sheard (as Dr Roland Summers), Roy Purcell (as Chief Prison Officer Powers), Eric Mason (as Senior Prison Officer Green), Dave Carter (as Prison Officer), Bill Matthews (as Prison Officer), Barry Wade (as Prison Officer), Martin Gordon (as Prison Officer), Tony Jenkins (as Prison Officer), Clive Scott (as Arthur Linwood), Neil McCarthy (as George Patrick Barnham), William Marlowe (as Mailer), Hayden Jones (as Vosper), David Calderisi (as Charlie), Johnny Barrs (as Fuller), Matthew Walters (as Main Gates Prisoner) |
