The gang from It’s Always Sunny in Philadelphia invaded Conan and it was Always Sunny overload with fan tattoos, origin stories, and as always, way too much information about Danny/Frank who are becoming increasingly harder to tell apart. The creators and stars of Always Sunny admitted there is no premise for the show, which all boils down to it being a show about nothing, a concept which they will proudly take credit for originating. Seinfeld Shmeinfeld, these guys aren’t afraid to bend the truth a little bit.

A conversation about the bizarre tattoos that adorn some Sunny fans got pretty creepy, and Glenn Howerton, Charlie Day and Rob McElhenney all share their own swoony tattoos, and there’s an educational moment here too. Rob teaches you what to do if you got yourself a Cosby tattoo and feel like you made a mistake. Hopefully you’re a fan of 70’s rock.

And if there’s one thing more frightening than Always Sunny Tattoos, it’s Frank.

Danny DeVito talked about how much they get away with on Always Sunny which is a long way off from what television was like when he was on Taxi. Back then, DeVito said, the network was always breathing down your neck. But now, Danny pointed out that he can, and will do just about anything the script asks for. Nothing is beneath him, he said, and nothing is off limits. “I’ve never said not to anything. I’ve been slimed, they painted me black for a camouflage show, I rollered myself, I dug up my dead wife, and I’m naked…a lot. All of a sudden I’m Willem Defoe.” The Conan show put together a terrifying montage of some of Frank’s more shocking moments. Be warned.

And in a weird time paradox, we may have learned the inspiration for the “Frank” character. But here’s where it gets weird, because the character seems to be based on the guy they met after they hired him to play Frank. Let that one rattle around for a bit. When the guys met Danny, they were waiting to meet him for lunch when suddenly he came tearing in “like a firecracker”, ordered food for everyone, and started telling stories about his fathers collection of teeth and watches. DeVito of course remembers none of this, but assumes that he just wanted wanted to make an impression and make sure they didn’t forget meeting him. As far as he knows there are no teeth or watches. Kaitlin Olsen talked about the first time they met on set, and Danny just said something about her boobs. He says he was “in character” but it kind of sounds like he’s always “in character.”

All of the clips are embedded below, including one where Charlie and Dee talk about their love scene (it was Rob’s idea), and why they don’t get in any trouble for portraying Korean dictators, or dressing up in black face or as they call it, “full black”.

Watch more late night tv comedy clips.