Billy Mitchell (EastEnders) revealed in 2006 that the role was extended by "coincidence and chance": "I was offered four episodes and here I am, about 800 later. [...] Ross Kemp (Grant) said that he was leaving, and there was a gap in the Mitchell family, so they brought me back to do stuff towards his leaving. After that they offered me a year." Billy was reintroduced in 1999, making recurring appearances. He was involved in the leaving storyline of Grant Mitchell in October 1999, before returning later in the year as a regular character. When Billy was first introduced, he was depicted as
Peggy Mitchell be so sad to leave Peggy behind; she's such a wonderful character to play. I have had the pleasure of working with a marvellous cast and crew and have made many lasting good friends. To have had the honour of showing the Queen around the set is something that will stay with me forever." Executive producer Diederick Santer said: "Barbara has contributed so much to "EastEnders" over the last 15 years, plus countless episodes, and countless amazing storylines. Peggy Mitchell is a truly iconic character, and along with Steve McFadden and Ross Kemp, Barbara has made the Mitchells the premier