She played a role in three stories from the BBC science fiction serial Doctor Who. All three were directed by her husband Douglas Camfield:
* The Daleks' Master Plan as Blossom Lefavre
* The Invasion as Telephone Operator
* Inferno as Petra Williams
Camfield and Dunn were married during the production of The Daleks' Master Plan.
She also appeared in episodes of Shoestring, Z-Cars, The Bill and Kessler.