Magnum, P.I. Season 3 Episode 10

Overview
Hired to protect a young tennis star, whose off-court behavior leaves much to be desired, Magnum finds his loyalties strained when a prime suspect turns out to be an old and dear friend.
Director: Burt Kennedy
Guest Star: Anulka Dziubinska, Claudette Nevins, Elaine Giftos, Henry Gibson, Kim Richards, Nels Van Patten, Philip English
Episode Title: Mixed Doubles
Air Date: 1982-12-02