It's Always Sunny in Philadelphia - Season 3, Episode 10 - Rotten Tomatoes

Mac Is a Serial Killer


Episode Info

There's a serial killer running loose in Philadelphia, and Mac has been exhibiting some pretty bizarre behavior as of late. When the gang begins to suspect that Mac is behind the murders, they cook up a plan to catch him red handed. But Charlie believes that Mac is innocent, and he's ready to use all the legal knowledge he's gained from watching television to prove it. Later, when the gang learns the true cause for Mac's bizarre behavior, the reality of the situation proves far more disturbing than any fictional scenario they could dream up.


Charlie Day
as Charlie
Kaitlin Olson
as Sweet Dee
Danny DeVito
as Frank Reynolds
Marcus Harris
as Pepper Jack
Sandy Martin
as Mac's Mom
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Mac Is a Serial Killer Photos

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