Guest Stars Harry Fielder as Guard Valentine Dyall as Black Guardian Lalla Ward as Princess Astra John Woodvine as Marshal Ian Saynor as Merak Davyd Harries as Shapp William Squire as The Shadow Pat Gorman as Pilot Barry Jackson as Drax Susan Skipper as Heroine Iain Armstrong as Technician John Cannon as Guard Ian Liston as Hero Uncredited Stephen Calcutt as Super Mute
