It's Always Sunny in Philadelphia
Mac is a Serial Killer
Season 3, Episode 10 · Aired 2007-10-18
Synopsis
Mac has been acting strangely, leading Frank, Dennis and Dee to believe that he's the serial killer who has been terrorizing Philadelphia. So they set out to catch him, but for Dennis and Dee, that means they must first learn to think like serial killers themselves. Frank, meanwhile, is content to let a chainsaw do his thinking for him.
In the series
This episode is part of It's Always Sunny in Philadelphia (2005–present) on FX.
Five terrible people, infinite schemes — the anti-Friends.
Key cast
- Charlie Day as Charlie Kelly
- Glenn Howerton as Dennis Reynolds
- Rob McElhenney as Mac
- Kaitlin Olson as Dee Reynolds
- Danny DeVito as Frank Reynolds