She worked extensively in repertory and touring theatre before appearing on television in BBC TV comedy series such as The Two Ronnies, Fawlty Towers (as Jean Wilson, in an early episode in which a hotel proprietor, Basil Fawlty, played by John Cleese, seeks to stamp out suspected extra-marital liaisons on his premises), Yes Minister (as a journalist, who discovers that a Government Minister, whose wife is a friend of hers, has retained for himself a valuable vase presented during an overseas visit), Dad's Army (as a Second World War “land girl”), Morecambe and Wise, The Dick Emery Show, Terry and June, Sykes, and The Les Dawson Show.
Interspersed with the comedy were drama series which included appearances in Inspector Wycliffe, Anna Karenina, Minor Complications, Father Brown, The Prince and the Pauper, Judge John Deed and Waking The Dead.
Pertwee, who had been playing the Doctor for some time, had not been consulted and totally disagreed with the casting although he and Walker had worked harmoniously together in Oh Clarence.
Already contractually protected, Walker was paid for the entire season[1] but any monies earned at the BBC during the period of the contract were deducted.
Although committed to not talking about the issue in her release agreement, Walker began to discuss the circumstances surrounding her casting decades later.