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 Miranda Hart Chummy Browne Actor Vanessa Redgrave Mature Jenny (voice) Guest Star Monica Dolan Meg , Mave Carter Guest Star Terence Frisch Sid Carter Guest Star Dorothy Atkinson Jane Sutton Guest Star Laura Main Sister Bernadette Guest Star Cliff Parisi Fred Guest Star Lucy Robinson Matron Guest Star Emerald Fennell Nurse Patsy Mount Guest Star Robert Putt Mr. Gillespie Guest Star Roger Goldby Director John Martin Johnson Writer Heidi Thomas Writer