A moving and intimate insight into the colourful world of midwifery and family life in 1950s East London. The team at Nonnatus House return for a fifth series, in which Shelagh rushes to put together a children's choir in time for a BBC broadcast from the church. Elsewhere Trixie, having battled through her issues with alcohol, finds a new purpose in her keep fit classes. And could friendship blossom into something more for vicar Tom Hereward and Barbara?