Cast Credits Line of Duty (2012) Guest starring as Carroll Episode 2x04: Episode 4 (Mar 5, 2014) Call the Midwife (2012) Guest starring as Mrs. Bishop Episode 4x05: Episode 5 (Feb 15, 2015) Silent Witness (1996) Guest starring as Margaret Episode 18x05: Protection, Part One (Jan 19, 2015) Casualty (1986) Guest starring as Meryl Clarkson Episode 27x22: If Not for You... (Feb 9, 2013)