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
Ross Kemp in Afghanistan army. There was no point when they did not take the fight to the enemy." Ross Kemp in Afghanistan Ross Kemp in Afghanistan (also known as Return to Afghanistan, Middle East and Back on the Frontline in subsequent series) is a Sky One British documentary series fronted by actor Ross Kemp about the British soldiers fighting in the War in Afghanistan as part of the International Security Assistance Force (ISAF) mission against the Taliban. The first two series involved Kemp and a small embedded film crew following troops fighting in Helmand Province, documenting their part in the ongoing Operation Herrick.