Cast Credits Silk (2011) Guest starring as Cathy Doyle Episode 2x04: Episode 4 (Jun 5, 2012) Doctor Who (2005) Guest starring as Ma Episode 3x03: Gridlock (Apr 14, 2007) Holby City (1999) Guest starring as Carol Holbrook Episode 4x06: Starting Over (Nov 13, 2001) Casualty (1986) Guest starring as Bingo Friend 2 Episode 2x14: Burning Cases (Dec 12, 1987)