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.
Bethan has just a single day to repair her relationship with her teenage son.
Trace the self-destructive fall of Della Howells, Museum Director in her 40s who begins a dangerous relationship with a young man, and descends from a respectable middle-class woman into the criminal underworld of the art world.