Guest Stars Lynda Bellingham as The Inquisitor Michael Jayston as The Valeyard Tony Selby as Glitz Joan Sims as Katryca Tom Chadbon as Merdeen Adam Blackwood as Balazar Glen Murphy as Dibber Timothy Walker as Grell David Rodigan as Broken tooth Billy McColl as Humker Sion Tudor Owen as Tandrell Roger Brierley voices Drathro Uncredited Robert Goodman as Crew Member
