The mother from Exploits of a Mom is the Black Hat Guy's soulmateNot much to say here, except that that kind of trick seems like what those two'd get up to in their less sadistic moments. Obviously, a time machine is required- possibly with an accidental stop in the Jurassic era, just for Randall to work off some of his velociraptor issues using the BHG as an Author Avatar.
"Cueball" is Little Bobby TablesHis friends call him "Rob" in at least two strips.
Mrs. Roberts was the mother in Exploits Of A Mom because...
Randall Munroe is a pen name for River TamThis would explain a lot.
Randall Munroe is batfuck insane
Black Hat Guy is a survivor of the Heaven's Gate cult.
there is, in fact, no White hat guy.In this comic, He just forgot to color the hat in. Thats it.
The guy who wrote the script to buy one thing under a dollar each day on Ebay is now on the U.S. Fish and Wildlife Service's Illegal Animal Trafficking list."Who mails a bobcat?" indeed... Sub-guess: His name is Abu Dhabi. For this reason he is particularly worried about being on FBI watchlists, and he will get arrested for repeatedly receiving a kitten in the mail once Wildlife Protection is watching him over the bobcat incident. She's able to take on a "100% squirrel" form and still can talk while in it, and Web Comic characters make "guest appearances" in other authors' webcomics all the time...
The Beret Existentialist is a Time Lord.Like most xkcd characters, he has no name, but displays many personality traits similar to The Doctor such as moments of Cloud Cuckoo Lander -ness, and very philosophic tendencies. Also, recently, the ability to grow infinite wings. Given the style of his Nice Hat, possibly a reincarnation of Jamie from MythBusters.
Curiosity will meet the other Rover and neither will be alone again.Because I need closure, damn it.
Cueball is Doc ScratchThey both have cueballs for heads.
The guy who tried to shoot the Earth is the less-effective brother of the tornado hunter. He's just as crazy but lacks his brother's Reality Warper powers.