The gang voluntarily quarantine themselves inside of Paddy's in an attempt to keep their singing voices pristine for an upcoming competition when a severe flu outbreak sweeps Philadelphia.

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

"Asskickers" isn't just a hot new way to work out; it's a way of life...and maybe a cult.

The gang agrees to a truce while demonstrating Chardee MacDennis for an interested board game executive, but the nature of the game quickly sends things off the rails

Frank falls out the window causing him to think it's 2006, the gang approaches it as a do-over and attempts to fix their past mistakes.

Dennis and Frank square off against Dee and Mac for control of the mountain, while Charlie learns that the slopes have their own set of rules.

The gang have a new scheme and Frank tries to keep up.

Dennis tries to create an innovative mobile Paddy's pub experience but runs into trouble when customers refuse to cooperate, while Charlie and Mac attempt to catch a thieving leprechaun.

The Gang finds themselves in the middle of a focus group after a screening of Thunder Gun 4: Maximum Cool. They are determined to restore glory and traditional American values back into the franchise, even if it involves sabotage.

In the black-and-white noir world of his memory, Charlie navigates the seedy underbelly of Philadelphia as Frank has been "diarrhea poisoned," and it's up to Charlie to clean up the mess.

Dennis and Mac get into inflatable furniture to deal with the economy’s inflation, while Dee tries to find a place to crash after being evicted by her greedy landlord and Charlie wants to pitch Frank his crypto/online investment idea. And in this inflation episode everything gets bigger - Dee’s desperation, Mac’s lips, and even Charlie’s apartment!

Charlie cheers on Frank at a local chess tournament against a Russian grandmaster. Dennis helps Mac and Dee find boyfriends after getting irritated by Mac’s current boyfriend, Johnny.

After a physical reveals Dennis has high blood pressure, he decides to take a day away from The Gang to de-stress at the beach. But life has other plans, and his day spirals into a string of mishaps until he can no longer contain his rage.