10 Things Everyone Always Gets Wrong About Doctor Who
5. Prisoner Zero Runs Past The Window In Amy's House
Just past the 15 minute mark in Matt Smith's debut episode, the Eleventh Doctor accidentally leaves young Amelia Pond behind for a whopping 12 years, despite promising her he'd only be five minutes. Not cool.
With Amelia sat waiting in her garden, the camera pulls back inside her dark, eerie house - and a mysterious figure darts past the window.
This figure is never identified or explained, but considering that we'd just learned about the threat of Prisoner Zero - and with Amelia's landing door having opened of its own accord mere seconds before - it's understandable why a lot of viewers thought that it was Prisoner Zero who was lurking at the window.
However, as confirmed by writer Steven Moffat on the episode's commentary track, the original plan was to reveal that this figure was a future version of the Eleventh Doctor - the same Eleventh Doctor who travels back along his own timestream in the series finale, The Big Bang.
In fact, the very same shot of Eleven darting past the window was intended to be used again in The Big Bang, but was removed because Moffat felt that it didn't edit in very well.