Mac defends traditional marriage, while the rest of the gang reaps the rewards of wedded bliss.

Marital bliss turns into business, as the gang experiences the emotional and economic hardships of divorce.

The gang have much to prove when they attend their high-school reunion. They meet old friends and make new foes as they stroll down memory lane.

The gang come up with a new plan to buff their tarnished high-school reputations at their reunion.

The gang make a disturbing discovery after crashing Maureen's wedding.

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.

Old grievances bubble to the surface when The Lawyer agrees to sue Bill Ponderosa on behalf of the Liam McPoyle and his lost eye.