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A bit of snow at this time of year is a welcome sight, but you can have too much of a good thing, as proves the case when Nonnatus House’s jolly Christmas Day is followed by the Big Freeze, which kicks in on Boxing Day and throws the team’s work into chaos.

While Valerie helps a pregnant woman living in a caravan, Sister Julienne tries to reunite a family torn apart by abuse – cue an emotional guest spot from Anita Dobson.

Thankfully, Nurse Crane offers light relief as she locks horns with a policeman, and Fred’s panto turn is a sight to behold!

Prepare for tears and laughter in equal measure – we wouldn’t have it any other way.