When the entire Weaver family gets sick, it forces the Bird-Kersees to confront something new and terrifying -- the common cold. The Bird-Kersees - especially Larry - can't understand why Debbie takes care of her family even though she is exposing herself to their cold. Having learned there is no cure for colds, Larry makes the community quarantine the Weaver house, but Reggie has other plans.

When the Weavers and Bird-Kersees compete for membership in a brand-new, exclusive country club, they're forced to confront issues of class and race. Marty and Debbie become so obsessed with getting into the club that they blow off their alien neighbors and bring the kids to an open house for prospective members. When Larry and Jacki show up at the club unexpectedly, the results for both families are not what anyone had expected.