Premise: The 1990 season of the astronomy TV show starring Jack Horkheimer started on January 1, 1990. During this season, the show still had its original name, "Jack Horkheimer: Star Hustler". The show's episode numbering scheme changed several times during its run to coincide with major events in the show's history. The official Star Gazer website hosts the complete scripts for each of the shows.
Hypothesis: Horkheimer hosted Star Hustler.