High Quality Content by WIKIPEDIA articles! "Who Killed Archie?" is a storyline from the BBC soap opera EastEnders, which began on 25 December 2009, Christmas Day, when the character Archie Mitchell, played by Larry Lamb, was murdered by an unseen person. Events leading up to and following the murder put several characters in the frame, in the style of a whodunnit mystery. The culprit was kept a tight secret within the production crew as well, with only seven people knowing the identity of the killer. The murderer was revealed as Stacey Slater (Lacey Turner) during a live episode titled "EastEnders Live", broadcast on 19 February 2010, the show`s 25th anniversary. Turner was told thirty minutes before the broadcast that Stacey was the killer, and actors rehearsed several possible endings. Finally, a two-hander episode between Stacey and Max on 26 March 2010 explained how she killed Archie.