Peter Davison Doctor Who Actor Nicola Bryant Peri Brown Actor Maurice Denham Edgeworth Actor Edwin Richfield Mestor Actor Kevin R. McNally Hugo Lang Actor Dennis Chinnery Sylvest Actor Gavin Conrad Romulus Actor Andrew Conrad Remus Actor Seymour Green Chamberlain Actor Oliver Smith Drak Actor Barry Stanton Noma Actor Dione Inman Elena Actor Helen Blatch Fabian Actor Roger Nott Prisoner Actor John Wilson Jacondan Guard Actor Peter Moffatt Director Anthony Steven Writer John Nathan-Turner Producer