Douglas made an uncredited appearance as an audience member in the 1958 film version of Six-Five Special.
Douglas made an appearance in North Wales in September 2005 to unveil a plaque dedicated to the filming of Carry On Up the Khyber, as part of the movie had been shot in Llanberis.
Her television credits have included Gideon's Way, The Avengers, The Saint; in which she played Jenny Turner, a psychology student in the episode The Death Game, Z-Cars, Dixon of Dock Green, Jason King, Casualty, Holby City, Coronation Street,[1] and Doctor at Large.
After her husband Kenneth More was diagnosed with Parkinson's disease, she put her career on hold, after 11 episodes of Oil Strike North.
In 1988, Douglas met Scottish playwright and director Bill Bryden at a dinner party arranged by mutual friend Marsha Hunt.