Guest Stars Peter Sallis as Penley Wendy Gifford as Miss Garrett Peter Barkworth as Clent Michael Attwell as Ice Warrior Isbur Angus Lennie as Storr Tony Harwood as Ice Warrior Rintan Roger Jones as Ice Warrior Zondal George Waring as Arden Bernard Bresslaw as Varga the Ice Warrior Leader Sonny Caldinez as Ice Warrior Turoc