The team reunite but all is not well when a change of management shakes up Nonnatus House.

An explosion at the docks brings heartache to the people of Poplar, whilst Sister Ursula continues to ruffle feathers with her unpopular decisions.

A Chinese first-time mother faces an unexpected crisis, while new legislation and Sister Ursula cause serious problems for Shelagh and Dr. Turner.

An expectant mother buckles under the strains of pregnancy. As Tom provides pastoral care, he reveals why this case has touched him more than most.

Nonnatus House welcomes a new recruit; a vulnerable young man captures the hearts of Fred and Violet, while the whereabouts of Sister Mary Cynthia causes distress among the team.

Valerie Dyer oversees the care of an expectant Somali woman and is shocked when she uncovers a troubling aspect of this unfamiliar culture; and the Nonnatus family unites to provide the very best care for Sister Mary Cynthia.

Dr. Turner helps a family cope with the stresses of caring for a child with disabilities; and Nurse Crane faces an unexpected crisis.

An unexpected turn of events leads to a hastily arranged wedding; Shelagh finally goes into labor; and the arrival of the birth control pill leads to unforeseen consequences.