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