Christmas Special 2012: Part 2

S1 E102: Cynthia gets a lot more than she bargained for when she goes to fetch the milk from the doorstep of Nonnatus House. Outside is a small crate with a swaddled baby lying in it. She quickly rushes the child inside, but who has left it there and why? Meanwhile, Jenny takes it upon herself to help Mrs Jenkins uncover the mystery of what happened to her children when she was sent to the workhouse all those years ago.