The Doctor, Jo and the Master are taken to Draconia, where the Doctor tries to convince the Draconians of the truth.
Quest roles:
Michael Kilgarriff(Cyberman Controller), John Woodnutt(Seron), Roger Delgado(The Master), Stephen Thorne(First Ogron), Rick Lester(Third Ogron), Peter Birrel(Draconian Prince), Ian Frost(Draconian Messenger), Clifford Elkin(Earth Cruiser Captain), William Wilde(Draconian Captain), Vera Fusek(President of Earth), Michael Hawkins(General Williams)