Call the Midwife S05 12

In season five, Sister Monica Joan goes missing at Christmas time leaving the nuns and nurses distraught. Shelagh rushes to put together a children’s choir in time for a BBC broadcast from the church. Elsewhere Trixie, having battled through her issues with alcohol, finds a new purpose in her keep fit classes. And could friendship blossom into something more for vicar Tom Hereward and Barbara?