Overview: They've swapped Christmas – again. Can Hayley and James' relationship survive another turbulent family Christmas or has their future together gone off-piste?!
Overview: The Doctor and Clara face their Last Christmas. Trapped on an Arctic base, under attack from terrifying creatures, who are you going to call? Santa Claus!
Overview: Students Hayley and James are young and in love. After saying goodbye for Christmas at a London train station, they both make the same mad split-second decision to swap trains and surprise each other. Passing each other in the station, they are completely unaware that they have just swapped Christmases.
Overview: Hairdresser Maria is fixated by The Sound of Music - it was the film she saw the night she was jilted 18 years ago. In a bid to confront her demons, Maria decides to travel to Salzburg, but with her mother and teenage offspring in tow she gets more than she bargained for.
