Doctor Who Guest cast, played by Keith Barron Episode 20x17: Enlightenment, Part One (Mar 1, 1983) Episode 20x18: Enlightenment, Part Two (Mar 2, 1983) Episode 20x19: Enlightenment, Part Three (Mar 8, 1983) Episode 20x20: Enlightenment, Part Four (Mar 9, 1983)
