Sister Monica Joan holds the key to the diagnosis of a mystery illness.

A newly promoted Jenny finds herself facing her most challenging case to date.

Sister Julienne works at Holloway Prison, and Shelagh receives a devastating diagnosis.

Jenny's life is turned upside down when Alec has a terrible accident.

Chummy and Cynthia meet a young woman with Down's syndrome who is found to be pregnant.

Patsy is removed from midwifery duties due to her brusque manner.

Chummy throws herself into preparations for a visit from her mother.

Shelagh and Dr Turner await news from the Adoption Society.

Lucille must win the trust of a mother who is terrified of giving birth. Nurse Crane and Dr Turner are anxious to find a possible smallpox sufferer.

Barbara gets involved with a recently widowed pregnant woman, and Sister Monica Joan has her cataract surgery.

Dr Turner gets involved with a troubled young man, and Lucille makes new friends. Meanwhile, Barbara lies ill in hospital.

The team must rally to prepare for Sister Monica Joan's birthday. Meanwhile, the closing of a nearby maternity home brings in an influx of expectant mothers to the Nonnatus midwives…

Exposed to the elements, they operate in bleak conditions with limited access to water and electricity to help their patients, just in time to reconvene in Poplar for Christmas.

Sister Monica Joan holds the key to the diagnosis of a mystery illness.

A newly promoted Jenny finds herself facing her most challenging case to date.

Sister Julienne works at Holloway Prison, and Shelagh receives a devastating diagnosis.

Jenny's life is turned upside down when Alec has a terrible accident.

Chummy and Cynthia meet a young woman with Down's syndrome who is found to be pregnant.

Patsy is removed from midwifery duties due to her brusque manner.

Chummy throws herself into preparations for a visit from her mother.

Shelagh and Dr Turner await news from the Adoption Society.