versions of their series, typically 5–10 minutes long. Series 4 (1974) Carla Lane became sole writer for the fourth series. She felt it was now time for the Liver Birds to start thinking about longer-term relationships with men. John Nettles played Paul, Sandra's (frustrated) boyfriend, and Jonathan Lynn played Robert, Beryl's boyfriend. "I always wanted The Liver Birds not to be too keen about marriage—not to down it—but not to be out to get a boyfriend to marry," Lane explained. Beryl's mother (Sheila Fay) voiced the critical view: "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." Series 5 (1975) 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 spotted her potential new flatmate: 'I went to see a musical in town--Willy Russell's, John, Paul, George, Ringo..and Bert, and saw Elizabeth Estensen.' Lotterby saw the performance at Hughes' suggestion, and asked Estensen to audition for the part. 'She was loud, and abrasive, and exactly what I wanted,' said Lotterby. So Beryl, the bouncy blonde, was replaced by feisty, flame-haired Carol. Now into the fifth series, Carla Lane expanded her range from single life to family life and introduced Carol's relatives: the Boswells. "They were a close family—they were a dysfunctional family" said Estensen, and they included Carol's brother Lucien, played by native-Liverpudlian Michael Angelis; her father Mr. Boswell played by Ray Dunbobbin; and her mother Mrs. Boswell played initially by Eileen Kennally and later Carmel McSharry. Carla Lane's later series Bread revolved around the Boswell family and, in interviews, Lane agreed that the two families were probably related. Christmas Special (1975) Series 6 (1976) Series 7 (1976) Christmas Special (1976) Series 8 (1977) Christmas Special (1977) Series 9 (1978–1979) Series 10 (1996) In 1996, 17 years after the final episode of the classic original series was broadcast, the BBC revived the series, reuniting Beryl and Sandra as they coped with the aftermath of their respective failed marriages. As