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
Doctor Who (series 4) disappearing from planet Earth and stories driven by a missing or lost planet. Executive producer Russell T Davies stated in the same feature that the series' finale had been planned for three years previous to its airdate. The regular series focuses heavily on Donna: David Tennant stated that the "whole thirteen weeks is Donna's story ... why she's with the Doctor again is the subtext", and producer Phil Collinson cited Donna as a "fresh dynamic" for the fourth series. "Doctor Who Magazine" gradually revealed writers for the series alongside episode announcements. First-time writers for the programme included James Moran, co-writer