Home Television Got this joke from Reddit: Knock Knock. Who's there? Doctor. Doctor Who? No, it's just the Doctor. 12 years ago 12 years ago Television Got this joke from Reddit: Knock Knock. Who’s there? Doctor. Doctor Who? No, it’s just the Doctor. by Capt. Xerox 12 years ago12 years ago 155 Got this joke from Reddit: Knock Knock. Who’s there? Doctor. Doctor Who? No, it’s just the Doctor. Post PaginationPrevious PostPreviousNext PostNext Doctor Who, funny Previous Post Hard to believe that it's been 8 years since Huygens... by Capt. Xerox Next Post #scifi fans are bidding a fond farewell to cult fave... by Capt. Xerox