Protests on the Isle of Dogs cause chaos for the Nonnatus team, while an apparent immaculate conception concerns the midwives. Sister Julienne and Trixie plan to fight back the Board of Health’s disapproval of the way Nonnatus House operates.

It’s Christmas 1969, and the funfair and carol concert add color to frosty Poplar in wintertime.

Miss Higgins receives an unexpected visitor, and Sister Monica Joan ruffles feathers…

Rosalind oversees the care of a teenage mom and uncovers a disturbing truth…

As the summer ends, the pupil midwives prepare..

It’s summertime in Poplar, and during Violet’s first event as mayor…

The pupil midwives reach their third month of training. An anxious Trixie receives an urgent phone call…

Violet and Matthew are worried about Fred’s ability to serve as the mayor’s consort…

Shelagh and Joyce assist a heavily pregnant woman dealing with a severe mold infestation in her new flat. Nancy attends a "Raise the Roof Campaign" meeting against some of her peers' wishes. Trixie takes secret driving lessons from Fred.

Nonnatus House kicks off a new pupil midwife training. Dr. Turner supervises the delivery of a baby…