[8] She has made guest appearances on shows, such as Philip Marlowe, Private Eye, Casualty, New Tricks, Holby City, Uncle, Doctors and White Van Man.
Dickinson and then husband Peter Davison appeared together in Doctor Who producer John Nathan-Turner's production of the holiday pantomime Cinderella in 1983.
In 1997, she played Eunice Hubbel in Peter Hall's production of A Streetcar Named Desire at Theatre Royal, Haymarket.
From December 18, 2010, to January 9, 2011, Dickinson played the evil Queen Maleficent in the pantomime Snow White and the Seven Dwarfs at the Corn Exchange in Exeter.
[13] From December 13, 2014, to January 4, 2015, Dickinson played Queen Whoppa in the pantomime Jack and the Beanstalk at Exeter Corn Exchange.
In The Amazing World of Gumball Dickinson provides many voices including those of Granny Jojo, Mrs. Jotunheim, Karen, Felicity Parham, and the cupcake woman.
In 2014, Dickinson understudied Angela Lansbury in the West End production of Blithe Spirit – co-starring Simon Jones, with whom she had worked on The Hitchhiker's Guide to the Galaxy – but she never got to perform Madame Arcati, other than in the public understudy run, as Lansbury did not miss a single performance.