"The National Anthem" is the first episode of the British science fiction anthology series "Black Mirror". The episode was written by series creator and showrunner Charlie Brooker and directed by Otto Bathurst; it first aired on Channel 4, on 4 December 2011.
Charlie Brooker completed writing the first episode of Black Mirror in late December 2011.
If Charlie Brooker completed writing the first episode in late December 2011 that would be impossible as the episode aired early in December.