To return from a time trip to 1864 Colorado, the Szalinskis must help an alien recover his starship from a ruthless gang, who master the alien's weapons and defenses.

Diane wants to get in touch with her teenage-self so that she can understand what Amy and her new client, Howard, are going through. Wayne has invented a machine where you can see yourself in the past. When the electricity goes out, Diane is stuck as a teenager. Now Wayne must fix the machine and the family has to deal with Diane and her rebellious self.