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It's Always Sunny in Philadelphia picture

It's Always Sunny in Philadelphia (2005-2009)

Four friends run a bar in Philadelphia. (Learn more)

Starring: Rob McElhenney, Charlie Day, Glenn Howerton (View All)

Watch on Fancast: 14Full Length Videos; 266Clips & Other Videos

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Mac Is a Serial Killer

Episode 10 | Season 3 (2007-2008)
(Airdate Oct 18, 2007)

After Mac starts behaving strangely, Frank becomes convinced he's the serial killer terrorizing young, blond Philadelphia women. Frank, aided by a chainsaw and a skeptical Charlie, sets out to find evidence implicating Mac in the murders, but the whole gang is shocked to discover that Mac's big secret is that he's dating a transsexual.

Guest Stars