Family Matters (1989): Season 8, Episode 8

8 - 8: Karate Kids

A street gang, known as "The Piranhas", has intimidated Richie and 3J from playing at the local park, and when Urkel tries to intervene, he is quickly roughed up. The street gang begin celebrating their possible new place to deal drugs and play rap music until Bruce Lee Urkel (and similar Richie and 3J variants) show up to even the score. After slipping in the Winslows home, Nick fakes needing a wheelchair and threatens to sue Carl. However, his plans are foiled when Harriette and Eddie exploit and expose his scam and send him on his way.