The Doctor is a Time Lord: a 900 year old alien with 2 hearts, part of a gifted civilization who mastered time travel. The Doctor saves planets for a living—more of a hobby actually, and the Doctor's very, very good at it.
Mog feels a little ignored during the Thomas family's Christmas preparations. When she spots the huge Christmas tree, she freaks out and climbs to the roof, where she refuses to move no matter how hard the family tries.
London widow Cora Seaborne moves to Essex to investigate reports of a mythical serpent. She forms an unlikely bond with the village vicar, but when tragedy strikes, locals accuse her of attracting the creature.
