Guest Stars Elliott Cairnes as Guard Captain Bill Kerr as Giles Kent Colin Douglas as Donald Bruce Mary Peach as Astrid Patrick Troughton as Salamander Milton Johns as Benik Adam Verney as Colin Carmen Munroe as Fariah Margaret Hickey as Mary Bill McGuirk as Guard in Corridor Christopher Burgess as Swann Bob Anderson as Fighting Guard Andrew Staines as Sergeant to Benik
