Nonnatus House has a new recruit, and viewers are intrigued by Sister Catherine's backstory and also by the actress who plays her.
It's always exciting when a new midwife arrives to help deliver the babies of Poplar, and the arrival of Sister Catherine to Nonnatus House to undertake midwifery training, is no exception. There is always a slight concern among viewers that new characters are being introduced because another is set for departure - fans have recently been worried that Cyril could leave Call The Midwife, and the threat of Trixie leaving to join Matthew in America looms ever large in people's minds.
