It's Always Sunny in Philadelphia Season 4 Episode 7
Who Pooped the Bed?
Charlie and Frank awake to find poop in their bed. Neither will confess to being the owner, so they, Mac, and Dennis try to scientifically deduce who dropped the deuce. Dee wants to do something a bit more sophisticated, so she invites the waitress and Artemis to a girls' night out.
Guest Stars
Artemis Pebdani
Artemis
Mary Elizabeth Ellis
Waitress
David Hornsby
Matthew 'Rickety Cricket' Mara
Jason Duplissea
Scientist
Fran Kranz
College Student