A group of aliens are sent to Earth, disguised as a human family, to experience and report life on the 3rd planet from the sun.
Cast: John Lithgow, Kristen Johnston, French Stewart, Joseph Gordon-Levitt, Jane Curtin, Simbi Khali, Elmarie Wendel, Wayne Knight
Elvis Costello entertains at the Solomon's going away party.
Having witnessed Dick's alien encounter with Liam Neesam; Mary requires an explanation. The "Big Giant Head" delivers some disturbing news.
Dick and Don share the cost of a timeshare. Sally discovers Tommy has grown taller than Harry.
Sally gets a job doing TV weather. Dick gives little respect to Mary's wish to spend some time apart.
Mary has her purse snatched in a park, so Harry, Nina and Mary attend a self defense course that Don is teaching. Dick and Sally become a nightclub magician and a glamorous assistant.
Sally, Harry and Tommy rent out Dick's room, while Dick and Mary are away on an archaeological dig, where Mary is disappointed to come up empty after Dick finds a "pointy rock".
Tommy goes away to college, causing Dick extreme parental withdrawal. Meanwhile, Sally & Harry interview potential replacements, and Sally hires a "pretty boy" to be the new information officer.
Sally is stunned to find Rutherford's 10 most powerful men don't include her beau, Officer Don. With Tommy about to matriculate, Sally focuses her alien super powers on getting Don to be man she can be the great woman behind.
Start spreading the news, the Solomons are in New York City!
Out of boredom, Dick, Sally and Harry go to a parallel universe and end up in New York where they all live the good life.
To Mary's chagrin, her rich sister Renata visits and Dick thinks up a plan to punish her for the grief she caused Mary. Sally and Harry start a youth center in the Solomon's living room.