Extreme home makeovers, gas prices, and waterboarding. Yep, it's another season of FX’s original comedy series It’s Always Sunny in Philadelphia. This year, nothing is off limits. Dee has a heart attack. Mac and Charlie die. Everybody sings and somebody poops. And we finally learn the heritage of Paddy’s Pub as we flash back to 1776 in “The Gang Cracks the Liberty Bell.”