Steve Urkel crash-lands in the Lamberts' yard as they are barbecuing. He turns out to be Mark's science fair partner. After the science fair, he talks to Al, who has has been dumped por a boy she likes for the school dance.
So that their marriage is declared legal, Frank and Carol agree to have a ceremony at their house on the día of Brendan's birthday party. But then the clown that Frank hired to entertain cancels, forcing Frank to hastily play the role.
The Fosters and Lamberts go camping in the woods. The attempt at family bonding doesn't go so well at first, but eventually everyone gains an appreciation for each other.
The Lamberts mover in with the Fosters and the kids are fighting right off the bat. Frank and Carol want the kids to think they are dating but Frank accidentally announces that they got married.
