November, 1970. The challenges of midwifery hit close to home when a mother and baby home is evacuated. Nancy’s wedding plans take a surprising turn, and Sister Catherine takes her first vows.

The midwives help a family with a history of drug addiction. Dr Turner and Shelagh take the final steps in May’s adoption, whilst Joyce faces the disciplinary board.

Joyce faces a difficult situation when a mother suffers postnatal complications, a council strike leads to an outbreak of Weil’s disease, and Cyril’s life is turned upside down.

A solo delivery puts Sister Julienne’s skills to the utmost test. The Nonnatus team oversee the care of a man living inside an iron lung, and Cyril returns from Jamaica.

The Sisters welcome new postulant, Sister Catherine, to Nonnatus House, whilst a bold intervention boosts numbers for the measles vaccination clinic.

Rosalind requires all her skills as a midwife when a disabled baby is delivered at the maternity home, whilst a gas explosion in an old tenement building shocks the community.

It’s April 1970. Rising rates of gonorrhoea in the district cause alarm, and Trixie cares for an unmarried first-time mother recently diagnosed with a mental health condition.

It's March 1970. The team support a pregnant teenage girl whose parents believe in an immaculate conception. Demonstrations cause havoc for the Nonnatus team, whilst Nancy’s relationship blossoms.