Sheila Dunn

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

Her father, Bill Dunn, designed the bulletproof engine used in spitfires, which were featured in Victory of the Daleks.