Charlie goes into overdrive when he's notified that the health inspector will be arriving that day. Meanwhile, the rest of the gang is trying to exploit a flaw in the air-miles reward system.

The gang takes a trip to a local waterpark. Dennis takes on a protégé. Frank and Charlie are determined to ride every ride. Mac and Dee get stuck in a tube slide.

Mac and Dennis move to the suburbs for cheaper rent but find it hard to adjust.

The gang fight over a lottery ticket and seek out an arbitrator to decide a rightful owner, who also decides if Frank is a hero or hate monger.

Paddy's has been put on a list of bars that are sexually hostile to women, and the gang must attend a sexual harassment seminar to get off the list.

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.

The gang tries to expand their horizons by going on a road trip to the Grand Canyon.

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.

In the season finale, Charlie gets the gang to help him put together a rock opera based on his song "Nightman."

Court is in session at Paddy's Pub as Frank and Dennis present their cases to the rest of the gang, resulting in a verdict that will change their lives FOREVER... but not really.

Frank runs into an old adversary at the gym when he begins teaching Dee to box after she was robbed. Hoping to make some extra money on the side, Mac and Dennis make preparations for Charlie to compete in an underground street fighting match.

Charlie, Mac, and Dennis formulate a plan to take advantage of the rising gas prices. By purchasing excess amounts now, they can sell it in the future and profit. As usual, things don't go as planned. Dee is also out to make money when she learns that Bruce is going to give the family fortune to a Muslim cultural center. She and Frank try to stop him and get the cash for themselves.

Dennis reveals his foolproof system for seducing any woman to the rest of the gang, but they don't grasp the concept.

Charlie and Dee become romantically involved with two members of a wealthy family, which arouses jealousy in Mac, Dennis and Frank.

Dee gets in with a group of cool, rich housewives. Dennis hits it off with some everyday blue-collar bros. Frank struggles to renew his license, and Charlie and Mac deal with a new generation of bicycle bullies.

After witnessing EMTs resuscitate a Paddy's patron, Mac and Dennis set out to become the pinnacle of masculinity; Frank tries to prove a prank's innocence with The Lawyer; Dee attempts to hack her part-time side hustle with Charlie's help as he descends into the fast-paced life of a chef.

When the gang learns that they are in danger of losing their bar due to a zoning mishap, they resort to some outlandish and extreme methods to prevent that from happening. Meanwhile, Frank isn’t too happy when his wife returns to town.

Barbara hooks up with Mac to make Frank jealous, which leads to retaliation from Dennis.

The gang attempts to find adventure on the sea after they purchase their 'new' boat.

Traffic problems as a result of the President's visit to Philadelphia makes it difficult for the gang to see the summer's biggest film, "Thunder Gun Express".

Mac, Dennis and Dee try out for the Philadelphia Eagles. Also interested in becoming an Eagle is Liam and Ryan McPoyle's brother, Doyle.

In the season finale, Charlie accidentally puts Paddy's up as a prize for a dance marathon, which prompts the gang to enter the competition in order to save their bar.

The gang gets a real scare after Dee reveals she's pregnant, forcing the guys to recall their last hazy Halloween party to determine who the father is.

Motivated by the drama teacher who inspired her, Dee takes a job as a substitute teacher, and exposes her students to the culture of Paddy's with a field trip to see the Gang's take on the Lethal Weapon series: Lethal Weapon 5.

The gang plays the most twisted board game ever. Dee and Dennis face Mac, Charlie and Frank.