Last episode of the series for the midwives at Nonnatus House tonight sees Dr Turner horrified to realise he may be partly to blame for the recent rise in birth deformities. Elsewhere, Sister Evangelina returns to work although she has clearly been affected badly by her stroke, and her health continues to deteriorate. Also tonight, a pregnant bride goes into labour during her wedding reception, as her mother Tessie is forced to come to terms with her grandchild being conceived out of wedlock.