Cast Credits Doctor Thorne (2016) Starring as Countess de Courcy (3 episodes) Episode 1x03: Episode 3 (Mar 20, 2016) Episode 1x02: Episode 2 (Mar 13, 2016) Episode 1x01: Episode 1 (Mar 6, 2016) Jonathan Strange & Mr. Norrell (2015) Guest starring as Mrs. Wintertowne (2 episodes) Episode 1x02: How Is Lady Pole? (May 24, 2015) Episode 1x01: The Friends of English Magic (May 17, 2015) Fortitude (2015) Starring as Margaret Allerdyce (8 episodes) Episode 1x12: Episode 12 (Apr 9, 2015) Episode 1x11: Episode 11 (Apr 2, 2015) Episode 1x09: Episode 9 (Mar 19, 2015) Episode 1x08: Episode 8 (Mar 12, 2015) Episode 1x07: Episode 7 (Mar 5, 2015) Episode 1x06: Episode 6 (Feb 26, 2015) Episode 1x05: Episode 5 (Feb 19, 2015) Episode 1x01: Episode 1 (Jan 29, 2015) View 5 more View 5 less Endeavour (2012) Guest starring as Caroline Bryce-Morgan Episode 4x03: Lazaretto (Jan 22, 2017) Downton Abbey (2010) Guest starring as Susan MacClare Episode 5x08: Episode 8 (Nov 9, 2014) Lewis (2006) Guest starring as Caroline Croft Episode 1x04: Expiation (Mar 4, 2007) Foyle's War (2002) Guest starring as Amanda Reece Episode 2x04: The Funk Hole (Dec 7, 2003) Brideshead Revisited (1981) Starring as Cordelia Flyte