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 Gethin Anthony George Saint Guest Star Sophie Rundle Pamela Saint Guest Star Emerald Fennell Patsy Mount Guest Star Cheryl Campbell Lady Browne Guest Star Jenna Russell Sister Morgan Guest Star Ben Caplan PC Peter Noakes Guest Star Laura Main Shelagh Turner Guest Star Stephen McGann Dr. Patrick Turner Guest Star Hugh Warren Producer Heidi Thomas Writer Minkie Spiro Director Harriet Warner Writer