Charlie: Bingo, look at this little room.
Frank: It’s a linen closet Charlie.
Charlie: Yeah, they want you to think it’s a linen closet, Frank. Alright, check behind the shelves and shit.
Dee: Why?
Charlie: ‘Cause in Scooby Doo secret tunnels are always behind shelves, there’s gonna be one.
Dennis: Can we not base our decisions on what does or does not happen in episodes of Scooby Doo, godammit!
It’s Always Sunny in Philadelphia 5.06 - “The World Series Defense”