News surfaces about Mac's Dad, Luther, being a cuddle suspect. Mac goes into full "P.I". mode to clear his father of any wrong doing.

It's Always Sunny in Philadelphia Season 10 Episodes...

• s10e01 - The Gang Beats Boggs
• s10e02 - The Gang Group Dates
• s10e03 - Psycho Pete Returns
• s10e04 - Charlie Work
• s10e05 - The Gang Spies Like U.S.
• s10e06 - The Gang Misses the Boat
• s10e07 - Mac Kills His Dad
• s10e08 - The Gang Goes on Family Fight
• s10e09 - Frank Retires
• s10e10 - Ass Kickers United: Mac and Charlie Join a Cult

It's Always Sunny in Philadelphia Show Summary

Five egocentric friends who run a neighborhood Irish pub in Philadelphia try to find their way through the adult world of work and relationships.

Unfortunately, their warped views and precarious judgments often lead them to trouble, creating a myriad of uncomfortable situations that usually only get worse before they get better.