Guest Stars Elliott Cairnes as Guard Captain Patrick Troughton as Salamander Bill Kerr as Giles Kent Colin Douglas as Donald Bruce Mary Peach as Astrid 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
