Born in 1950, Bullen is the youngest of an equestrian family. Space 1999 was Bullen's first role. She has since narrated a David Macaulay documentary Castle (1983), and appeared in The XYY Man (1977) and The Sandbaggers (1978). She appeared in John Le Carré's A Perfect Spy (1996) and Inspector Morse (1998).
She was in many first series episodes from Force Of Life onwards. In Year Two she was only in some episodes (The Metamorph, The Exiles, Journey to Where, The Taybor, The A B Chrysalis, The Bringers of Wonder parts 1 and 2).
She appeared at the 2014 convention in Peterborough, Britain.
- Force of Life, Alpha Child, The Last Sunset, Voyager's Return, Collision Course, Death's Other Dominion, The Full Circle, War Games, The Last Enemy, The Troubled Spirit, Space Brain, The Infernal Machine, Mission of the Darians, Dragon's Domain, The Testament of Arkadia, The Metamorph, The Exiles, One Moment of Humanity, Journey to Where, The Taybor and The AB Chrysalis Bullen's IMDB entry also lists End of Eternity, Earthbound and both parts of The Bringers of Wonder