Plot: Frank's behavior is more bizarre than usual---so bizarre that even the gang notice---so they decide to stage an intervention.
Cast
Charlie DayCharlie KellyCharlie Day was 33 in It's Always Sunny In Philadelphia - Season 5 - The Gang Gives Frank an Intervention (Episode 4).
Birthday: Mon, Feb 09 1976
Glenn HowertonDennis ReynoldsGlenn Howerton was 33 in It's Always Sunny In Philadelphia - Season 5 - The Gang Gives Frank an Intervention (Episode 4).
Birthday: Tue, Apr 13 1976
Rob McElhenneyRonald 'Mac' McDonaldRob McElhenney was 32 in It's Always Sunny In Philadelphia - Season 5 - The Gang Gives Frank an Intervention (Episode 4).
Birthday: Thu, Apr 14 1977
Kaitlin OlsonDeandra 'Dee' ReynoldsKaitlin Olson was 34 in It's Always Sunny In Philadelphia - Season 5 - The Gang Gives Frank an Intervention (Episode 4).
Birthday: Mon, Aug 18 1975
Danny DeVitoFrank ReynoldsDanny DeVito was 64 in It's Always Sunny In Philadelphia - Season 5 - The Gang Gives Frank an Intervention (Episode 4).
Birthday: Fri, Nov 17 1944
Nora DunnDonnaNora Dunn was 57 in It's Always Sunny In Philadelphia - Season 5 - The Gang Gives Frank an Intervention (Episode 4).
Birthday: Tue, Apr 29 1952
Suzy NakamuraTabithaSuzy Nakamura was 35 in It's Always Sunny In Philadelphia - Season 5 - The Gang Gives Frank an Intervention (Episode 4).
Birthday: Sun, Dec 02 1973
Mary Lynn RajskubGail the SnailMary Lynn Rajskub was 38 in It's Always Sunny In Philadelphia - Season 5 - The Gang Gives Frank an Intervention (Episode 4).
Birthday: Tue, Jun 22 1971
Crew
Fred SavageDirectorFred Savage was 33 in It's Always Sunny In Philadelphia - Season 5 - The Gang Gives Frank an Intervention (Episode 4).
Birthday: Fri, Jul 09 1976
Scott MarderWriterScott Marder was 30 in It's Always Sunny In Philadelphia - Season 5 - The Gang Gives Frank an Intervention (Episode 4).
Birthday: Mon, Sep 17 1979
Rob RosellWriterRob Rosell was >> in It's Always Sunny In Philadelphia - Season 5 - The Gang Gives Frank an Intervention (Episode 4).
Birthday: Unknown Birthday