One of the boys of Buckle’s paper shop becomes unwell. Sister Veronica spearheads a new council initiative to monitor the health of working children in the borough. Trixie is thrown into a challenging case involving an underage mother.

Nancy oversees a child born out of wedlock, but things take a very unexpected and shocking turn. Dr. Turner and Sister Veronica discuss a new contraception procedure: the Vasectomy. The Board of Health delivers some unwelcome news to Sister Julienne.

Nurse Crane is shocked when her fitness comes into question during a ventouse training course. Trixie cares for a Hindu mother and her newborn twins, but it’s not long before an emergency gastroenteritis outbreak is declared at the maternity home.

As she sets about helping a mother whose newborn baby is suffering from a clotting disorder, Nancy is harboring a secret of her own. Sister Veronica meets a newlywed on her rounds, and the case shocks the women of Nonnatus house.

Lucille struggles with her mental and emotional health; Sister Julienne is deeply concerned by an angry red rash on a patient’s breast and a referral is quickly made to St Cuthbert’s.

With Christmas approaching, the midwives move to their maternity clinic and are delighted when their first patient is a familiar face. Life in Poplar returns to normal after the tragic train crash, and everyone unites for a festive talent show.

Christmas 1966 promises to be memorable one. The Nonnatus House team are faced with their busiest Christmas Day ever as the Maternity Home is filled with expectant moms and challenging cases.