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Everyone in the Tanner household takes a liking to Danny's new girlfriend Cindy (Debra Sandlund in her first series appearance). This affection is, however, not extended to Cindy's obnoxious son Rusty (Jordan Christopher Michael, likewise in his first appearance), who specializes in nasty practical jokes. As it turns out, it takes a kid to "break" a kid, and the girls assume the responsibility of teaching Rusty a lesson.