The group decides that they are capable of breaking a legendary beer drinking record set by Wade Boggs; Mac oversees the execution.
In an effort to expand their matchmaking possibilities, Dee, Dennis, Mac, Charlie and Frank dive into the online dating scene.
Pete is released from the mental hospital; Dee and Dennis try to have him recommitted while Mac and Charlie try to pull him back into his hard-partying form.
Charlie's in charge when a surprise health inspection interrupts a less hygienic project; he rallies the gang together to make sure Paddy's passes the test.
Mac and Dennis convince Dee to help them spy on the fish factory; Frank and Charlie become suspicious of the other three and investigate.
The group separates from one another to find out who they are as individuals after another failed endeavor.
Mac's dad, Luther, is listed as a murder suspect; Mac investigates the murder in an effort to clear his father's name.
The troupe appears on on a nationally televised game show; Dennis tries his hardest to hide their eccentricities without any help.
Frank decides to retire; the foursome begin to plot and plan ways for each of them to take control of the bar.