Doug's 20th high school reunion seems like a dud until an old friend comes up with a way to retaliate for past grievances with their old principal, while Danny and Spence try to hook up with old classmates. Carrie and Arthur try to have a movie night together.
Carrie soon grows tired of Doug's forcing his new vegetarian lifestyle down her throat. Meanwhile, Carrie's boss wants to start discussing novels with her, and Spence takes on some humiliating new jobs.
Feeling hurt over not being invited to a block party, Doug adopts a dog just to prove to the neighbors that he's an okay guy—a decision he soon regrets. Meanwhile, Arthur falls prey to the gambling bug when trying to help Danny beat it.
The Palmers' vacation plans are ruined when Doug frightens Major so much that he refuses to be babysat by the Heffernans. In the meantime, Arthur begins hiring out himself and friends from the senior center to ride with solo drivers so they can use car-pool lanes.
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