Fat Albert and the Cosby Kids (1972) : 7x4

The gang goes on a camping trip to Cedar Lake where they meet some new people. Along the way, Fat Albert takes a particular interest in Janine, a pretty girl, and brags about his knowledge of water safety, only to find himself embarrassed when he learns she's the camp's main lifeguard, who knows more about safety than he thinks. The two get along and she makes him her assistant lifeguard. Eventually, their teamwork comes in handy when Rudy's prank on Russell backfires, leading both to jeopardy. After the narrow rescue, the gang and their new friends get a firsthand lesson in water safety.