Night and the Doctor: Good Night

The Doctor returns from another night out with River Song. Amy, wide awake and sitting in her nightie on the stairs, catches him. She convinces him to tell her what he does while he's out at night, then tells him why she is finding it hard to sleep lately because her life doesn't make any sense. Due to the events of "The Big Bang", she can remember two versions of her life, one without her parents and one with. The Doctor comforts her and reminds her of the saddest moment of her life. It was at a fair when she dropped an ice cream. While recalling the event, she suddenly remembers a woman with red hair, dressed in a nightie, who gave her a new ice cream. When she finishes the anecdote, the Doctor is by the doors, ready to go with her to the fair.