The D.E.N.N.I.S. System

Name: The D.E.N.N.I.S. System
Genre: Comedy
Released: November 19, 2009
Cast: Danny DeVito, Glenn Howerton, Kaitlin Olson, Charlie Day, Rob McElhenney

It's Always Sunny in Philadelphia: Season 5: Episode 10

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It's Always Sunny In Philadelphia: Season 10

Episode Details & Credits

FX | FXX | Air Date: November 19, 2009

Starring: Danny DeVito, Glenn Howerton, Kaitlin Olson, Charlie Day, Rob McElhenney

Summary: Dennis teaches the guys his comprehensive seduction system that will help them gain the undying love and devotion of any woman. However, Charlie struggles to utilize what he just learned, while Mac and Frank decide to go in their own direction. Meanwhile, Dee fears that her boyfriend might be using a similar system to play her.

Creator: Rob McElhenney

Genre(s): Comedy

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Season 5 Episodes

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S5:E12. The Gang Reignites the Rivalry
Air Date: December 10, 2009
tbd
S5:E11. Mac and Charlie Write a Movie
Air Date: December 3, 2009
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S5:E10. The D.E.N.N.I.S. System
Air Date: November 19, 2009

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Seasons & Episodes

72

Series Overview
Season 17

78
- Season 17 Overview
  Air Date: July 9, 2025
Season 16

82
- Season 16 Overview
  Air Date: June 7, 2023
Season 15

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- Season 15 Overview
  Air Date: December 1, 2021
Season 14

tbd
- Season 14 Overview
  Air Date: September 25, 2019
Season 13

tbd
- Season 13 Overview
  Air Date: September 5, 2018
Season 12

tbd
- Season 12 Overview
  Air Date: January 4, 2017
Season 11

tbd
- Season 11 Overview
  Air Date: January 6, 2016
Season 10

tbd
- Season 10 Overview
  Air Date: January 14, 2015
Season 9

86
- Season 9 Overview
  Air Date: September 4, 2013
Season 8

tbd
- Season 8 Overview
  Air Date: October 11, 2012
Season 7

tbd
- Season 7 Overview
  Air Date: September 15, 2011
Season 6

84
- Season 6 Overview
  Air Date: September 16, 2010
Season 5

78
- Season 5 Overview
  Air Date: September 17, 2009
- tbd
  S5:E12. The Gang Reignites the Rivalry
  Air Date: December 10, 2009
- tbd
  S5:E11. Mac and Charlie Write a Movie
  Air Date: December 3, 2009
- tbd
  S5:E10. The D.E.N.N.I.S. System
  Air Date: November 19, 2009
- tbd
  S5:E9. Mac and Dennis Break Up
  Air Date: November 12, 2009
- tbd
  S5:E8. Paddy's Pub: Home of the Original Kitten Mittens
  Air Date: November 5, 2009
- tbd
  S5:E7. The Gang Wrestles for the Troops
  Air Date: October 29, 2009
- tbd
  S5:E6. The World Series Defense
  Air Date: October 22, 2009
- tbd
  S5:E5. The Waitress is Getting Married
  Air Date: October 15, 2009
- tbd
  S5:E4. The Gang Gives Frank an Intervention
  Air Date: October 8, 2009
- tbd
  S5:E3. The Great Recession
  Air Date: October 1, 2009
- tbd
  S5:E2. The Gang Hits the Road
  Air Date: September 24, 2009
- tbd
  S5:E1. The Gang Exploits the Mortgage Crisis
  Air Date: September 17, 2009
Season 4

69
- Season 4 Overview
  Air Date: September 18, 2008
Season 3

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- Season 3 Overview
  Air Date: September 13, 2007
Season 2

70
- Season 2 Overview
  Air Date: June 29, 2006
Season 1

64
- Season 1 Overview
  Air Date: August 4, 2005