What? eventually became so popular it was developed into its own series, Doctor What.
The What? War
The What? War occured during the airing of Series 8 when /who/ tried to defend itself against hordes of screaming newfags, both real and imagined. In the end /who/ whatted itself to death and was forced to regenerate.
There's a dank Robot of Sherwood webm kicking around on /who/ that tells the What? story.