Mac Is a Serial Killer 

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.


Jerry Levine


Rob McElhenney (developer), Glenn Howerton (developer) | 3 more credits »




Episode credited cast:
Charlie Day ... Charlie Kelly
Glenn Howerton ... Dennis Reynolds
Rob McElhenney ... Mac
Kaitlin Olson ... Dee Reynolds
Danny DeVito ... Frank Reynolds
Mary Elizabeth Ellis ... Waitress
Brittany Daniel ... Carmen
Marcuis Harris ... Pimp
Rest of cast listed alphabetically:
Bill Chott ... Gary
Sandy Martin ... Mac's Mom


When a serial killer is loose in Philadelphia who targets blonde white women, the gang all tries to figure it out. So Dennis and Dee notice that Mac is visiting an unknown apartment everyday and suspect it to be him. So they decide to find out who the serial killer is by doing various experiments. Written by James Hake

Plot Summary | Add Synopsis




TV-MA | See all certifications »

Parents Guide:

View content advisory »


Release Date:

18 October 2007 (USA) See more »

Company Credits

Show more on IMDbPro »

Technical Specs


Aspect Ratio:

4:3 Full Frame
See full technical specs »

Did You Know?


The final scene where The Gang confronts Mac is a parody of NBC's show "To Catch A Predator". See more »


Frank Reynolds: I'm going to go oil my chainsaw.
Dee Reynolds: What?
Dennis Reynolds: Frank, we don't need the chainsaw. Is that what's in that bag?
Frank Reynolds: Oh, we do... because drawing a confession out of someone is like doing a beautiful dance... a beautiful dance with a chainsaw.
Dennis Reynolds: He makes less and less sense as the days go by.
Dee Reynolds: I don't get it... at all.
See more »


References Law & Order (1990) See more »


Temptation Sensation (Main Title)
Written by Heinz Kiessling
Performed by Heinz Kiessling
See more »

Frequently Asked Questions

This FAQ is empty. Add the first question.

User Reviews

Contribute to This Page

Free Movies and TV Shows You Can Watch Now

On IMDb TV, you can catch Hollywood hits and popular TV series at no cost. Select any poster below to play the movie, totally free!

Browse free movies and TV series

Stream Popular Action and Adventure Titles With Prime Video

Explore popular action and adventure titles available to stream with Prime Video.

Start your free trial

Recently Viewed