70867
Yeah, I'm filling up my DVR with the Doctor at the moment.

You know what I really love in humor? Layered humor. You know, when you set up a joke, and then use the punchline from a different but related joke. (For example, at first glance the above xkcd refers to Doctor Who, but upon closer inspection the attire of the baseball players clues the reader into the fact that they were in fact in the middle of the [in]famous "Who's On First?" comedy routine.) I
adore that kind of implied wordplay--it's not the best example, since I'm not a huge fan of in-jokes on principle (if you're making a joke, it should be something that either a huge portion of the audience will get, or at the very least they should be able to piece together the meaning of the joke via context and delivery), but it still gets the point across.
Also, my half-hearted Google search shows no Doctor Who episodes named "Who's On First?", nor for that matter any centered around baseball. What is wrong with these people?!? Why are they passing up a perfectly horrible opportunity to pun mercilessly?!?!