 Apsion appeared intermittently on "Shameless" as Monica Gallagher between 2004 and 2006, before becoming a regular cast member for the show's fourth series in 2007.She left the show in 2008, with her final scenes airing in March 2009 during the sixth series.She briefly returned to the role in 2011 during the eighth series and for the eleventh and final series in 2013.