Sheila Dunn

Sheila Dunn (11 April 1940 - 3 March 2004) appeared in several Doctor Who stories: as Blossom Lefavre in TV: The Daleks' Master Plan, the computer voice of the Electromatic company in part two of TV: The Invasion and Petra Williams in TV: Inferno. She was married to television director Douglas Camfield, who directed all three of those stories.