Welcome, Diddy! Sean Combs guest stars on this episode of It's Always Sunny in Philadelphia.
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Charlie and the gang have a crisis of faith as his mother battles cancer on It's Always Sunny in Philadelphia. "Charlie's Mom Has Cancer" is the sixth episode of the show's eighth season.
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It's Always Sunny in Philadelphia Season 8 Episode 6 Quotes

Dennis: Yeah, I gotta say - this is a strange place for a doctor's office. What's this guy's name?
Mac: Dr. Jinx.
Dennis: Dr. Jinx is the name of a monkey, not a man.

Frank: You're losing your mind. You're being scammed.
Dee: I'm losing my mind? How many pairs of shoes have you lost this month, Frank?
Frank: (looks down, sees his own bare feet) Three... four!