Based on the memoirs of Jennifer Worth and created for TV by Heidi Thomas, CALL THE MIDWIFE follows nurse Jenny Lee and the midwives and nuns from Nonnatus House convent, who visit the expectant mothers of Poplar, providing the poorest women with the best possible care. Chummy, PC Noakes and baby Freddy are back in the East End, Sister Bernadette, now known as Shelagh since leaving the convent, is preparing for her wedding to Dr. Turner and Jenny is facing huge challenges personally and professionally. At Christmas, when an unexploded World War II bomb is found under a warehouse close to Nonnatus House, the nuns and dozens of local families become homeless. Dr. Turner is in a race against time to immunize children against polio, but when the illness strikes closer to home, he finds there’s nothing he can do but hope. Chummy persuades a royal visitor to the East End to open the new Community Centre. It’s a race against time as Chummy tries to get everything in place for the big day.