Sister Winifred's eyes are opened to Poplar's seedy underworld when she cares for expectant prostitute Bridget Cole. Horrified by the young woman's lack of experience, she draws on her teaching experience to help, and with help from Sgt Noakes sets out to promote safe sex to all local working girls. Barbara struggles to understand why expectant father Frank Robbins would pressure his wife to bear him a son, while Sister Monica Joan is feeling sidelined - until she finds herself unexpectedly assisting Shelagh with an emergency birth. Trixie invites herself along to a meeting between Tom and the Bishop - but things get tense when the idea of the couple moving to Newcastle is raised.
Elenco: Helen George , Jenny Agutter , Judy Parfitt , Pam Ferris , Cliff Parisi , Bryony Hannah , Laura Main , Jessica Raine , Linda Bassett , Vanessa Redgrave , Leonie Elliott , Miranda Hart , Stephen McGann , Jennifer Kirby , Charlotte Ritchie .