Magnum, P.I. - Season 3 Episode 15
Basket Case

T.C. and Magnum train their respective junior basketball teams for an upcoming game. T.C.s team seems to have the advantage until Magnum meets a plucky teenager with a great game, and persuades her to join his team. Magnum and Higgins take a shine to the girl, and discover that her foster parents are criminals who are using her as a pawn in running their con games.