EastEnders: E20 to complaints from viewers about the length of some of the episodes in series 1. Series 3 began production in May 2011, and took about four weeks to film. Unlike "EastEnders", "E20" uses incidental music, which Scott Matthewman of "The Stage" said makes it feel like an episode of "Hollyoaks", a Channel 4 soap opera targeted at a teen audience. A remix of the "EastEnders" theme tune was created for the series, with members of the public submitting remixes in a competition held on the BBC website. The competition opened on 11 November 2009 and was officially launched on 13
EastEnders twice-weekly episodes available online and an omnibus on BBC Three. A third series of 15 episodes started in September 2011. "EastEnders" and rival soap opera "Coronation Street" took part in a crossover episode for Children in Need on 19 November 2010 called "East Street". On 4 April 2015, "EastEnders" confirmed plans for a BBC One series featuring Kat and Alfie Moon. The six-part drama, "", was created by executive producer Dominic Treadwell-Collins and his team. In the spin-off, the Moons visit Ireland where they "search for answers to some very big questions." Until its closure, BBC Store released 553 "EastEnders"