The Liver Birds "Man is the dog, and woman is the bone. He eats the best of you, and buries the rest of you, and when his dish is empty—he'll dig you up again." This would be the last series with Beryl; as Polly James explained: "The reason I left the programme in the end was that I felt I was in danger of caricaturing what was already a pretty outrageous character." Producer Sydney Lotterby had to find a new leading actress to keep the series going after Polly James' departure. In 1971 he'd replaced Pauline Collins with Nerys Hughes, and Hughes herself
Polly (Doctor Who) created Ben and Polly in 1966. What happens to Polly after her return to Earth is not certain. The Doctor seems to think that Ben will become an Admiral and that Polly will look after Ben, but it is unclear if this is a prediction or simply wishing them well. In "The Sarah Jane Adventures" story "Death of the Doctor" (2010), Sarah Jane mentions that Polly is now working at an orphanage in India with Ben. On 23 July 2017, the first trailer for the 2017 Christmas special episode, "Twice Upon a Time", was shown during the 2017 San Diego