Doctor Who 2005 - S07E06 The Bells of St John (PREQUEL)

"The Bells of Saint John" will be the seventh episode of the seventh series of the British science-fiction drama Doctor Who. The episode will star Matt Smith as the Eleventh Doctor and Jenna-Louise Coleman as Clara Oswald. The episode plot line will focus on something sinister living in the Wi-Fi.

Prequel
At the playground, the Doctor is sitting at the swing till he meets a little girl. They talk about how he lost someone twice and he just sits there so maybe he might bump into her again. Then the little girl goes to her mother who says "Clara Oswald you're not suppose to talk to strangers", revealing that the girl was in fact the younger version of who the Doctor was looking for.