Jessica Raine Jenny Lee Actor Jenny Agutter Sister Julienne Actor Pam Ferris Sister Evangelina Actor Judy Parfitt Sister Monica Joan Actor Helen George Trixie Franklin Actor Bryony Hannah Cynthia Miller Actor Vanessa Redgrave Mature Jenny (voice) Guest Star Laura Main Sister Bernadette Guest Star Miranda Hart Chummy Noakes Guest Star Ben Caplan PC Peter Noakes Guest Star Cliff Parisi Fred Guest Star Stephen McGann Dr. Turner Guest Star Claire-Louise Cordwell Bella Collins Guest Star Scarlett Archer Molly Brignall Guest Star Alexander Cobb Ritchie Brignall Guest Star Philippa Lowthorpe Director Heidi Thomas Writer