Call The Midwife explores complex medical and personal situations on the midwifery and district nursing rounds. It is now 1969, and the period drama 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.

As the unfamiliar terrain of the Hebrides stretches the team to the utmost at Christmas, their return to Poplar sees them braving a landscape that feels suddenly unfamiliar. Budgets are being cut, and hospitals reorganised. Terraced houses are being demolished, and traditional family structures torn apart. There are wrecking balls everywhere, and it's up to Sister Julienne, and the midwives and medics of Nonnatus House, to help find a way out of the rubble. When they themselves come under threat, their job becomes even harder.

In series seven, the nuns and nurses find themselves tested, both personally and professionally, as never before. It's 1963 and all around them they see the old East End vanishing, as slum clearances make way for bold new tower blocks to accommodate expanding communities. Their work brings them into contact with a wide range of challenging issues, from Leprosy to Stroke, Cataracts, and unmarried mothers.