Gerard Christopher was 30 years old when he made his debut as Superboy, making him older than Christopher Reeve, Dean Cain, Brandon Routh, Henry Cavill and Tyler Hoechlin when they made their respective debuts as Superman.
Gerard Christopher personally sold VHS tapes and DVDs of episodes on his website. Christopher owns the master tapes of all of the episodes in which he portrayed Superboy. Christopher stopped selling them when Warner Brothers acquired the rights and released official DVD sets.
Stacy Haiduk (Lana Lang) was the only first season regular cast member to be retained for Season Two, as well as the rest of the series.
The first two seasons were set at Shuster University, and the school had a building called the Siegel Center. This was a reference to the original creators of the Superman/Superboy characters, Joe Shuster and Jerry Siegel.
The show was canceled following a lawsuit filed by Warner Brothers (the company that owned the Superman "family" of characters) against the Salkinds who had leased the rights in the early 1970s and made the "Superman"(Christopher Reeves) film series. The Salkinds produced the first 3 films, and sold the rights to "Cannon/Golan Globus Production" who released Superman IV: The Quest for Peace (1987). WB claimed that they had first shot at making a series (the show was distributed through Viacom). The case was settled and the rights officially reverted to WB and the show has not been rerun in North America since, although a DVD release of the first season did occur in 2006. The remaining seasons were released via the Warner Archive label, but only as made-to-order season collections on DVD.