Guests: singers Jerry Vale Al Martino and Enzo Stuarti comedian Ron Carey The Lennon Sisters tennis champ Bobby Riggs oceanographer Jim Fish and Shamu the Whale. Highlights: The Lennons sing "Down by the Lazy River." Jerry, Al, Enzo, Foster and Mike sing a medley of Italian and Italian-American songs. An exhibition by trained dolphins and a discussion of methods of preventing shark attacks.