In order to secure the licence to produce a "Superman" cartoon, the founders of Filmation got several of their friends to set up a faux animation studio. They invited representatives from DC Comics to tour their facility, where they saw what looked like a large, busy production staff. In reality, the staff of Filmation was much smaller.
This was the first animated television series based on DC Comics.
Bud Collyer (Superman/Clark Kent), Joan Alexander (Lois Lane) and Narrator Jackson Beck earlier voiced the same roles on the Superman radio series and the 1940s Superman cartoon series..
This was the first cartoon produced by Filmation.
In the book "Creating the Filmation Generation", Lou Scheimer recounts that in one of the earliest 'Superboy' segments the animators had included a scene in which Krypto the Superdog extinguished a fire by urinating on it. Scheimer managed to catch this and had it changed before the segment aired on television.