Jill Elizabeth Novick and Greg Vaughan both had recurring roles on Beverly Hills, 90210 during the 1996-97 season, although their characters had little (if any) interaction.
Director Anson Williams also guest-starred on an episode of The Love Boat.
Dick Van Patten also made a number of guest appearances on The Love Boat, and played the ship's doctor in the original 1976 pilot movie.
Marion Ross was one of the most frequently appearing guest stars on The Love Boat, and had a recurring role as Capt. Stubing's wife during the final season.