When Marty Weaver and his wife, Debbie, move to a gated community with their three children, they discover their neighbors are aliens who had not met humans.
Marty and Debbie dislike the kids' entitled attitude toward Christmas and decide to return the gifts and use the money for a family vacation; when the Weavers realize the aliens already opened all the presents, Larry Bird must save Christmas.
Larry Bird helps Debbie deal with PTA politics and its officious president, Linda (Nora Dunn); Jackie's competitive nature kicks in when she helps Marty coach soccer.
When the Weavers and the Bird-Kersees chaperone a school dance, Debbie tries to re-create a romantic moment with Marty; Jackie wishes she and Larry had a more interesting story about how they met.
The relationship advice Debbie gives Reggie backfires, making things harder for Jackie and Larry; Amber doesn't want to discuss her boyfriend with Debbie.
Marty offers to teach the Bird-Kersees how to drive; Amber regrets opting for lessons from a driver's ed teacher when Ms. Porsche (Sandra Bernhard) turns out to be very unconventional.
After the Bird-Kersees go see a Broadway show, Larry decides to create a musical of his own; an emergency phone call could expose the Bird-Kersees' true identities.
Debbie is ecstatic when a businesswoman (Bethenny Frankel) offers to help revitalize her purse business; Jackie jumps in to help, but soon she and Debbie realize they are in way over their heads.
During a trip to Atlantic City, Marty learns that Larry can count cards -- and see through them; Jackie confesses that she has always wanted a human wedding; Dick Butkus receives an ominous call from his grandpa.