Watch It's Always Sunny in Philadelphia Season 2 Episode 4 online via TV Fanatic with over 6 options to watch the It's Always Sunny in Philadelphia S2E4 full episode. Affiliates with free and paid streaming include Amazon, iTunes, Vudu, YouTube Purchase, Google Play, and Hulu Plus.
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Barbara hooks up with Mac to make Frank jealous; Dennis attempts to get revenge on Mac by sleeping with his mother.
- It's Always Sunny in Philadelphia
- It's Always Sunny in Philadelphia Season 2
- Episode Number: