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It's Always Sunny in Philadelphia - Season 3 Episode 10 : Mac Is a Serial Killer (2025)

Trailer

After Mac arrives to the bar with scratches on his neck and exhibiting strange behavior, Frank comes to the conclusion that he is the serial killer terrorizing young women in Philadelphia. Frank sets out with his trusty chainsaw and a doubtful Charlie to find evidence to implicate Mac in the murders. In search of another suspect, Dennis and Dee do a little role-playing in order to help themselves better understand who they might be dealing with.

Networks:FX, FXX

Genre: Comedy

Casts: Charlie Day, Glenn Howerton, Rob Mac, Kaitlin Olson, Danny DeVito

Last Air Date: Aug 20, 2025

Quality: HD

IMDb: 8.283 (1201 Vote)

Release: Jan 01, 1970

View: 1201

CAST

Charlie KellyCharlie Day

Dennis ReynoldsGlenn Howerton

Ronald 'Mac' McDonaldRob Mac