A guy dies in Paddy's pub. Dennis and Mac use the guy's death as an excuse to get close to the guy's attractive granddaughter. Meanwhile, Charlie discovers that Dennis and Dee's grandfather was a Nazi.
When half of Paddy's gets bought out by a business developer, the gang seeks revenge. Unfortunately, an ill-timed dog-napping plot, a poorly made video tape, and a flaming bag of poop threaten the gang's chances of getting their property back.
Inspired by the movie "Million Dollar Baby", Frank teaches Dee to inflict punishment while Dennis and Mac teach Charlie to take punishment. But both fighting careers are derailed by the use of "performance enhancing supplements".
The gang discovers that if you run for office, people will pay you to quit. So of course, the gang exploits this and Dennis runs for office. At the same time Frank and Charlie try to stop this, which ends up in a feud.
To prove their patriotism, Charlie and Dee try to upstage the local anti-smoking group, while Dennis and Mac turn Paddy's into a bastion of true freedom. But when Frank takes things too far, Paddy's is populated with creeps and lowlifes, and the gang decides they want to live under a totalitarian state.
When Dennis and Dee discover their mother has lied to them about Frank being their dad, they get to know their real father. Meanwhile, Mac and Charlie attempt to impress Mac's imprisoned father by becoming hardened criminals.
After Dennis and Dee's gold-digging mother dies from a botched plastic-surgery operation, Dee and Frank scheme to get their name in the will, while Dennis inherits the house and makes plans for a party mansion.
A corporate chain offers to buy the Paddy's Pub, leaving Dee and Charlie unemployed and forcing them to find jobs at another restaurant, where they abuse their positions and take advantage of the manager, who is Dee's friend.
While Dennis and Dee try to figure out if the rapper Dee is dating has a mental handicap or not, Charlie, Mac, and Frank try to start their own band without knowledge of how to play musical instruments.
Dennis is angry because he's being mistaken for a fat guy rather than the sex offender who moved next door to Charlie. Meanwhile, Mac's father is released from prison and he and Mac have some catching up to do.
After stumbling upon a kilo of cocaine, the gang is forced to pay off a $25,000 debt to the mob. Mac becomes a mob informant, while Frank pimps out Dennis as an escort at the local country club. Charlie stumbles upon an opportunity to sell illegal narcotics.
While paying off their debt to the mob, Charlie and Dee try to find a way to make fake cocaine in order to fool them, while Dennis ranks in thousands of dollars being pimped out at the local country club. Mac realizes his position as a mob informant isn't being utilized to its full potential.
Dee and Mac become Guardian Angels and clean up the streets when a bum starts using the alley behind the bar to masturbate. Meanwhile, Dennis, Charlie, and Frank impersonate police officers in order to get preferential treatment.
After Charlie accidentally puts Paddy's Pub up for 1st prize in a local dance competition, Frank makes the gang participate in the contest. Here, they form alliances and try to cheat the other contestants, as well as themselves, out of first place.
Mac and Dennis pursue the ultimate high of hunting another man by stalking Rickety Cricket, while Dee and Charlie become obsessed with eating human flesh after they come to believe Frank has fed some of it to them.
While Mac, Dennis, and Charlie use their classic setup to sell gallons of gasoline door to door, Frank subjects Dee to a series of torture and mind games when he suspects that Dee is trying to kill him while the two plot to steal their inheritance from Bruce Mathis.
After buying a billboard, Frank subjects Dennis to a series of humiliating tests in a competition to get on the billboard, while Mac tries to find female subjects willing to go through his own version of a reality show, of sorts.
The gang kidnaps the writer of a review claiming that Paddy's is the worst bar in Philadelphia and tries to force him to change his mind. But things get worse when Dennis and Dee accidentally kidnap the writer's neighbor.
In order to get Paddy's recognized by the city as a historical landmark, Mac, Dennis, and Charlie flash back to 1776 to tell the tale of the Paddy's crew's involvement in the cracking of the Liberty Bell.
While Frank buys a foreclosed house with intentions of selling it for profit, Mac and Dennis become hot-headed real estate brokers, and Dee takes advantage of a suburban couple looking to hire a surrogate mother.
Dee discovers that the waitress Charlie is obsessed with is getting married to her ex-boyfriend and plots to derail the wedding, while Mac, Frank and Dennis try to get Charlie back on the dating scene.
Taking Dee's advice seriously, Mac and Dennis decide that they're too co-dependent on each other and need to spend time apart. Meanwhile Charlie and Frank help Dee out with a major cat problem in her apartment.
Mac, Dennis, and Charlie seek revenge on another bar after their 10-year ban in a local flip-cup tournament is lifted, but find they need serious practice. Dee discovers new skills, and Frank wears tight pants.
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.
Things go awry as the Gang travels to Atlantic City for a charity benefit. While Frank, Dee and Mac try to survive in the woods, Dennis and Charlie hitch a ride to the city and have the night of their lives.
After years of being mistreated by Frank during the holiday season when he buys gifts for himself, Dennis and Dee decide to teach him a lesson by contacting his old business partner, Eugene, for help to make the mean-spirited and nihilist Frank see the Christmas spirit of giving, rather than taking. Meanwhile, Mac and Charlie reflect on their childhood Christmases, and realize that they were not as joyous and wonderful as they remembered from Mac remembering being taught how to break into peoples houses to steal their Christmas presents by his career-criminal parents, and Charlie who remembers his single, boozed-out, coked-up mother inviting a slew of "Santas"/clients over at her house.
Dee faces an IRS audit over her claim that the baby she carried as a surrogate is her dependent, while the guys decide to run the bar in an unemotional, democratic manner rather than their typical method of shouting and personal attacks.
When Frank's long lost brother Gino shows up at the bar, the two of them tell the gang about the jazz club they ran in the 1960s and 70s, and how they fell out over Shadynasty, a singer who was the love of both of their lives.
As a hurricane threatens Philadelphia, Mac, Dennis and Charlie go to a mall to buy supplies and check out the large breasted TV reporter broadcasting from there, while Frank and Dee prepare Paddy's, and its basement bunker, for the storm.
Dennis and Dee's Nazi grandfather is wasting away in a hospital, and it's their choice whether to pull the plug or not. Meanwhile, Charlie and Mac go crazy trying to find a dog painting they think has a lot of value.
While the city of Philadelphia's garbage men are on strike, Dennis, Mac, and Charlie decide to start a trash pick up business. And while being a big success, they must find out where to put this newly picked up trash.
When Dee gets asked by her therapist to bring in her so called 'issues,' Dee brings in the whole gang. And since they have all been called in, they have their own one on one therapy sessions, while many issues arise.
Under threat of a hostile takeover, the board of Frank's old company calls him back to run the company. As before, Frank maximizes the company's product: money. Dennis, Mac and Dee find Phillies VIP tickets and find themselves in a business deal of their own.
The gang starts playing an online video game and Charlie becomes obsessed with becoming the best player in the game. Meanwhile, Dennis is upset everyone else is playing the game all the time and not out enjoying the real world.
When an experiment successfully multiplies Charlie's intellect and takes him away from the bar, the rest of the gang find themselves struggling to complete the menial 'Charlie Work' that has kept the bar running for so long.
After creative differences over what constitutes tasteful nudity cause Frank to pull his money out of Lethal Weapon 6 during filming, Mac, Dennis, and Charlie screen their rough footage for investors in hopes of raising enough capital to finish the production of their latest masterpiece.
The Gang debates modern art after seeing Dee in a smut film; Mac and Charlie enlist the help of Frank and Cricket in order to prove that modern art is worthless, whilst Dee and Dennis adapt his erotic memoirs to prove that it isn't.
After an electric heating blanket shorts out while the gang watches The Wiz, they look in the mirror and realize they've turned black. They have to work out how to get back to being themselves by going through all the classic body switching shenanigans.
The gang takes a trip to a local waterpark, ripe with personal agendas and ulterior motives. Dennis feeds off his mantra of "the park provides" and takes on a protégé. Frank and Charlie are determined to ride every ride by any means necessary and Mac and Dee get stuck in a tube slide for most of the day.
Charlie thinks Mac's mom is holding his mom hostage so the gang installs spy cameras in their house to monitor what's going on. What they end up discovering is the moms are quite entertaining once Dennis makes some quick edits and adds a laugh track to the surveillance footage. Dee wants in on the new hit show and Frank becomes obsessed with banging Charlie's mom now that he's seen her on TV.
An episode filmed in the true crime style of Making a Murderer and The Jinx which begins with 911 call: A cat-woman formerly known as Maureen Ponderosa has been found dead in an alley and Dennis is the prime suspect.
After finding out she's a male stripper's "rock bottom," Dee goes on a mission to prove she's the best thing that ever happened to him. Dennis takes over for the stripper with the help of his bag boy, Charlie. Meanwhile, Mac and Frank get sucked into a VR war game that causes Mac to develop his own case of PTSD.
It's Valentine's Day and Paddy's is packed with customers. Dennis implores the gang to do one day of actual work but everyone else is distracted by a mystery crate Cricket spotted in the alley. Eventually, the gang becomes convinced Dennis really wants them to work on their relationships and everyone shares their grievances without much resolution.
Meet Cindy, the new, ethnically diverse female member of the gang who can successfully pull off scams. Everything is working until Mac introduces a new member: a life-like sex doll that looks exactly like Dennis.
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.
With nothing to do while their phones update to the latest software, the gang decides to reminisce on old times; as everyone misremembers events from their past, the gang's current reality becomes altered.