Spaced/WMG

Bilbo Bagshot is the identical twin of Manny from Black Books

Black Books and Spaced are proven to exist in the same universe, since in one episode of Black Books, Manny is heard talking to Twist Morgan. Because of this, the only reasonable explanation for why Bilbo and Manny (both played by the same actor, Bill Bailey) look so similar is that they are identical twins. Additionally, Tim is probably related to Evan, the manager of Goliath Books.