Foul play at work? A mysterious incident threatens young John's opportunity to defeat a rising tennis star. While his father is shooting a photo layout for a sports magazine, John Karras almost defeats tennis star Tom Aberling in a pick-up match, but Tom's father (guest star Gary Lockwood) feels the nonchalant game could ruin his son's reputation. This episode was shot on location at the Mulholland Tennis Club In Los Angeles. Realizing he is good enough at tennis to be a challenge to a professional, John decides to enter the tournament against Tom, only to discover foul play before the tournament ever begins.