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
EastEnders eight characters from the show, Barbara Windsor left her role of Peggy Mitchell, which left a hole in the show, which Kirkwood decided to fill by bringing back Kat and Alfie, which he said would "herald the new era of "EastEnders"." "EastEnders" started broadcasting in high definition on 25 December 2010. Old sets had to be rebuilt, so The Queen Victoria set was burnt down in a storyline (and in reality) to facilitate this. In November 2011, a storyline showed character Billy Mitchell, played by Perry Fenwick, selected to be a torch bearer for the 2012 Summer Olympics. In reality,