Ninjas invade Matheson, and Team Szalinski is in for much kung fu fighting to save the town. A monk, Master P'tui, appears to help Wayne and teach him martial arts. Meanwhile, Nick, tired of being bullied into doing other people's homework, invents a spray that can turn anyone into a kung fu expert. Also, Lord Bilious wants Diane to defend him after he tried to bribe town officials and landowners to sell him the town.

Crazy greedy Jennings bets his company even though he can't play golf very well. He asks Wayne to build golf clubs to help them win but Jennings gets hurt so Wayne has to play. Meanwhile Diane and the kids are feeling crowded with Wayne's invention so they decide to sell the stuff they don't use but after a while people don't like them so now they have to get them all back.

Randy Rude the Science Dude comes into town to visit. and he wants to get married so Wayne tries to fix him up with the love chair and love booster. Something happens when Randy tries to leave with the van and presses the booster button that blasts them into space. Or are they really in space?