It's Always Sunny in Philadelphia Mac Is a Serial Killer (Season 3, Episode 10)
TV-MA
TV Episode | 23 min | Comedy

Primary photo for Mac Is a Serial Killer

It's Always Sunny in Philadelphia

Mac Is a Serial Killer (Season 3, Episode 10)

TV-MA

TV Episode | 23 min | Comedy

After reading that a serial killer is on the loose, the gang notices that Mac is acting shady and decides to find out if he's the man behind the murders.

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Cast	+ Add Cast
10 cast members

Name	Known for
Charlie Day Charlie Kelly Charlie Kelly See fewer	It's Always Sunny in Philadelphia (2005)
Glenn Howerton Dennis Reynolds Dennis Reynolds See fewer	It's Always Sunny in Philadelphia (2005)
Rob McElhenney Mac Mac See fewer	It's Always Sunny in Philadelphia (2005)
Kaitlin Olson Dee Reynolds Dee Reynolds See fewer	Finding Dory (2016)
Danny DeVito Frank Reynolds Frank Reynolds See fewer	Matilda (1996)
Mary Elizabeth Ellis Waitress Waitress See fewer	Masterminds (2015)
Brittany Daniel Carmen Carmen See fewer	Skyline (2010)
Marcuis Harris Pimp Pimp See fewer	The Stepfather (2009)
Bill Chott Gary Gary See fewer	This Is Us (2016)
Sandy Martin Mac's Mom Mac's Mom See fewer	Three Billboards Outside Ebbing, Missouri (2017)