Unbeknownst to Mac and Charlie, their new self-help workout program is part of a grandiose scheme for the Reynolds family to individually get what they want.
The gang chooses sides as they vie for majority control of Paddy's Pub in the wake of Frank's retirement.
Feeling that they need to maintain a certain level of decorum during their appearance on a nationally televised game show, Dennis tries to get the rest of the gang to tone down their eccentricities.moreless
With Charlie's help, Mac sets out to prove that his father is innocent of murder. Meanwhile, the Reynolds family attempt to intervene in Bill Ponderosa's plan to drink himself to death at Paddy's pub.moreless
Believing the dynamics of the group has had some profound negative effects on them as individuals, Dennis decides that he needs to get away from his friends. Much to his displeasure, Mac and Frank follow suit. This allows Charlie and Dee the opportunity to spend time together without being burdened by peer pressure and criticisms.moreless
After the recent activities of the fish factory across the street raises some red flags for the gang, Dennis and Mac have Dee go undercover as an employee to gather intelligence. Feeling left out and suspicious of their friends' secretive activities, Frank and Charlie decide to spy on them.
Charlie has the gang come together to help him undo the mess they have made of Paddy's so that the bar will look presentable during a surprise health inspection.
After hearing of Dee's success with group dating, the rest of the gang arranges to have the next events be held at Paddy's Pub in order to get some dates and make profit.moreless
In the spirit of Thanksgiving, the gang tries to make amends with those they have wronged in the past.
After having a falling out with Frank over the creative direction of Lethal Weapon 6, Mac, Dennis, and Charlie seek an alternative source of funding to finish the film.
Charlie finds himself becoming more intelligent after agreeing to be part of a University drug study. With Charlie's interests now focused elsewhere, Mac, Dennis, and Dee must take on Charlie work.moreless
To avoid getting sick with the flu and missing out on their chance to participate in an upcoming Boyz II Men singing competition, the gang decides to quarantine themselves in Paddy's Pub.moreless
During a convenience store robbery, each of the gang envisions how they would intervene.
The gang is forced to spend the day participating in activities of Mac's choosing.
Duped into investing in financial schemes, the gang tries to recoup their losses by getting others to participate.
The gang sets out to spruce up Paddy's image in order to gain the respect of the bartending industry.
Frank's gun advocacy ignites a debate about gun ownership.
A depressed Dee channels years of abuse from the rest of the gang into a burgeoning stand-up career.
What originally was supposed to be a private dinner between Mac and Dennis at Guigino doesn't go exactly as planned when the two notices that the rest of the gang is also in attendance.moreless
The line between reality and the virtual world begins to blur as a result of the gangs' obsession with computer games.
With Charlie by his side, Frank returns to his old company to help with a merger.
The gang's faith is tested as Charlie's mom combats cancer.