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.

It’s 1968, and the nuns and nurses from Nonnatus House return for more midwifery and family life. The midwives welcome a new nun, Sister Veronica, and tension in Poplar arises following the effects of Enoch Powell’s “Rivers of Blood” speech.