This opening episode sees newly qualified midwife, Jenny Lee, arriving at Nonnatus House. Believing she has been sent to a small private hospital, Jenny is surprised to find herself at a convent. Initially daunted by her surroundings, and not least the formidable Sister Evangelina and the eccentric Sister Monica Joan, Jenny gradually begins to find her feet. The story of the week focuses on the first case Jenny is allowed to handle alone, under the guidance of Sister Julienne - the care of Conchita Warren during her 25th pregnancy. Jenny is played by Jessica Raine, Sister Julienne by Jenny Agutter, Sister Evangelina by Pam Ferris, Sister Monica Joan by Judy Parfitt, Sister Bernadette by Laura Main, Trixie by Helen George and Cynthia by Bryony Hannah. And, would you believe it, Miranda Hart's in there too.