Guest Stars Lynda Bellingham as The Inquisitor Michael Jayston as The Valeyard Tony Selby as Glitz David Rodigan as Broken tooth Joan Sims as Katryca Adam Blackwood as Balazar Glen Murphy as Dibber Timothy Walker as Grell Tom Chadbon as Merdeen Uncredited Kathleen Bidmead as Elder of The Tribe of the Free Guy Matthews as Time Lord David Rogue as Alphan Servants
