Ten million years of absolute power, that's what it takes to blah, blah, blah...
Why yes, there are some bits of Doctor Who that I know off by heart and can recite along with the actors. Or sometimes a beat ahead of them.
Please do not judge me for this. :-)
(Seriously, though...you sing along to a song, people think of nothing of it. You recite lines of dialogue along to a film or TV programme, people think you're strange. Why is that?)