Kaitlin Olson is very good at what she does on It's Always Sunny In Philadelphia, including sinking into a bog in one take.

Danny DeVito has played the deranged con artist Frank Reynolds on It’s Always Sunny in Philadelphia. The greedy, gun-toting character has tortured and mercilessly exploited his (legal, not biological) ...

Along with a preview of It's Always Sunny in Philadelphia S17E03: "Mac and Dennis Become EMTs," we have a look at the PaleyLive panel.