The residents of Poplar prepare for Christmas, but an unexploded bomb is discovered, throwing festivities into chaos.
Jenny celebrates her birthday with Chummy and the girls, but soon after finds herself taking care of a patient in an abusive marriage.
Cynthia comes under scrutiny when a child she has delivered dies suddenly. Jimmy reappears in Jenny's life with surprising results.
Jenny is seconded to the London Hospital, while back in Poplar the midwives are introduced to a forthright pair of identical twins, one of whom is pregnant.
Jenny needs all her skill as a midwife when she assists at the birth of a disabled baby, and Nonnatus House plays host to an eccentric acquaintance of Chummy's.
The whole Poplar community pulls together to prepare for the annual summer fete. With the introduction of a baby show, the midwives will be more involved than ever.
Dr Turner manages to get Poplar included in the mass X-ray screening programme for TB. Meanwhile, Jenny's district nursing rounds introduce her to a family who have been devastated by the disease.
Cynthia's district nursing rounds find her tending to a diabetic John Lacey, a deplorable bully who consistently belittles his wife.
Change is in the air for the residents of Nonnatus House, as Chummy prepares for motherhood and Sister Bernadette tries to decide on her future.
