World's Worst Geek Joke

My son and daughter always make up knock knock jokes. Sometimes, they surprise me with a good one that comes out of their little pre-school heads. Every once in a while, I'll come up with a silly pun and share it with my kids. Sometimes they even laugh.

I haven't shared the following with them. There's many reasons for this. First, you have to be a geek (or a reasonable facsimile) to get it. Second, it's stupid. Third, it's probably not that original. 

But here it is. The worst, least original, stupidest geek joke ever muttered:

Knock knock.

Who's there?

Doctor.

Doctor who?

Yes.

Thank you, ladies and gentlemen. I'll be here all week.

~ Ben