Wayne's comment at a seminar offends some witches. The witches cast spells on the family. Now they must stop the witches and get Nick back.

Wayne goes back in time to prove to his family that the Bopkas and the song he likes really do exist. There he finds out that they are Russian spies with plans to take over the world by overthrowing parents. The family goes back in time to help him stop them. One question remains if they never sang the song, then where did he hear it?

Wayne brings a dead man's brain back to life, hoping to swap scientific ideas for inventions with him. However, the brain begins longing for the life he never had: a happy family. To this end, he (still having his "mind" stuck in the past) hypnotises Wayne's family; Diane is turned into a housewife, Amy becomes swedish, and Nick becomes a punk; Mr Jennings also becomes a goofy golfer. This done, he now plans to put his own brain in Wayne's head. Can Wayne undo the hypnotisum done to his family and get rid of this brain?