It's Always Sunny in Philadelphia Season 4 Episode 13 The Nightman Cometh 2008
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In the season finale, Charlie gets the gang to help him put together a rock opera based on his song "Nightman."
- Released: 2008-11-20
- Runtime: 22 minutes
- Genre: Comedy
- Stars: Charlie Day, Glenn Howerton, Rob McElhenney, Kaitlin Olson, Danny DeVito
- Director: Michael Rotenberg, Charlie Day, Glenn Howerton, Rob McElhenney
