Amazing Grace

Sister Monica Joan holds the key to the diagnosis of a mystery illness, and Chummy calls on her royal connections.

A newly-promoted Jenny faces her most challenging case yet, and Cynthia introduces a new birthing practice to Poplar's expectant mothers.

Sister Julienne and Trixie are rostered to work at Holloway Prison, and Shelagh receives a devastating diagnosis.

Jenny's life is turned upside down when Alec has a terrible accident. Sister Winifred helps a holocaust survivor bury the past and Shelagh decides to join the local choir.

When a young woman with Down's syndrome is discovered pregnant, sinister circumstances are assumed. Meanwhile, as the nuns organise celebrations for Sister Evangelina's jubilee, Nonnatus House greets new midwife Patsy. Elsewhere, Timothy Turner takes his first steps without his callipers.

Patsy's brusque manner lands her in trouble with the nuns and she is removed from midwifery duties. Soon after, she finds herself taking care of a male patient who is on bed rest after an accident at work.Trixie agrees to go on a date with a curate, Tom Hereward. Dr Turner and Shelagh discuss how they might expand their family.

As Jenny returns to Nonnatus House, her encounter with nervous expectant mum Faye forces her to break the rules. Chummy throws herself into preparations for her mother's visit, whilst Sister Julienne and Cynthia deal with acute mental illness in a newly delivered mother.

As preparations are made for Chummy to nurse her dying mother at home, Jenny finds herself drawn to help. Whilst Shelagh and Dr Turner await news from the Adoption Society, Shelagh pulls out all the stops when she enters her choir into a competition.