When The Doctor unintentionally lands in London on Christmas Eve, he meets Juliet Kane, a 16 year-old girl who had been sent to England and trained to kill him. But The Doctor discovers that her purpose for such is quite an important one. They join together to uncover the truth behind the disappearance of Julie's father and the agency known as G.P.A.E, as Julie, a girl who has lost almost everything, learns to have faith in that mysterious man and his little blue box.Creative Commons (CC) Attribution