Overview
- Part 1 airs at 8:15 p.m. on Christmas Day and Part 2 at 8:30 p.m. on Boxing Day on BBC One, with both episodes streaming on BBC iPlayer.
- The specials split between Poplar and Hong Kong, where the Nonnatus team responds after a landslide collapses a building and a rescue effort is organized.
- Dr Turner and Shelagh travel to search for Esther Tang as complications involving tuberculosis and local criminal elements raise the stakes.
- Familiar faces return, including Jenny Agutter, Helen George and Cliff Parisi, with Christopher Harper back as Geoffrey Franklin, Max Macmillan returning as Timothy Turner and Henry Goodman guest-starring as Mr Fischer.
- Creator Heidi Thomas says filming in Hong Kong was disrupted by an intensifying typhoon, and international viewing includes a free PBS window in the U.S. until January 24, 2026, plus BritBox releases in Canada on December 26 and Australia on December 27.