Because the first ever episode of Dr Who was broadcast 43 years ago today (23rd November 2006). Nothing special about the number 43, so being perverse I decided to mark the occasion.
First season of the Christopher Eccleston ' Doctor's is out on dvd...and well worth getting, too!
BTW...triva note: the grandson of Patrick Troughtn, Doctor #2, is playing the part of Harry Potter's cousin in the movies. That's straight form the WB website.