Gregory Scott Cummins

It's Always Sunny In Philadelphia · S2, E10

Dennis and Dee Get a New Dad

Dee receives numerous e-mails on her social networking page from a stranger claiming to be her and Dennis' father.
It's Always Sunny In Philadelphia · S10, E7

Mac Kills His Dad

Mac's dad, Luther, is listed as a murder suspect; Mac investigates the murder in an effort to clear his father's name.
It's Always Sunny In Philadelphia · S3, E11

Dennis Looks Like a Registered Sex Offender

Dennis' mistaken identity bothers him for the wrong reasons; Mac tries to bond with his ex-convict father, who bothers Dee.
It's Always Sunny In Philadelphia · S4, E5

Mac & Charlie Die: Part 1

After Mac's father is released from prison, Mac and Charlie stage their own deaths to save their lives; Frank, Dee and Dennis find unique ways of dealing with the loss.
It's Always Sunny In Philadelphia · S6, E13

It's a Very Sunny Christmas

While Mac and Charlie attempt to rediscover the spirit of Christmas for themselves, Dennis and Dee attempt to convince Frank to change his ways.
It's Always Sunny In Philadelphia · S4, E6

Mac & Charlie Die: Part 2

After Mac's father is released from prison, Mac and Charlie stage their own deaths to save their lives; Frank, Dee and Dennis find unique ways of dealing with the loss.

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