A Christmas journey

A rescue mission sees Nonnatus House's medics head to Asia in Call the Midwife's festive specials.

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The two-parter follows Fred (Cliff Parisi) and Violet (Annabelle Apsion) as they visit Violet's son Derek (Nicholas Atkinson), who's in the Hong Kong police force. But when they check in on the convent's branch house there, they find a building has collapsed and many people in dire straits. Sister Julie