Miss Higgins receives an unexpected visitor, and Sister Monica Joan ruffles feathers. Poplar votes for its Mother of the Year.

It is now 1969, and Call the Midwife returns with Poplar coping with the popularity of home births under the auspices of the Sisters. Season 13 will also see stories of poor housing challenges and health issues for the nurses, midwives, and nuns of the Nonnatus House.