detective chief inspector jill marsden is played by sophie stanton. she makes her first appearance on 5 march 2001, when she investigates who shot phil mitchell (steve mcfadden) which is part of the whodunit storyline, who shot phil?. she returns in 2002 and 2003, and returns again in 2009 for another whodunit storyline, who killed archie? and returns again on 5 january 2012 for her third whodunnit storyline, 'who's stalking phil?'.