It all starts when Cindy (Susan Olsen) finds Clark Kent's wallet in the street, and manages to deliver said wallet to Kent, not at the Daily Planet, but at a television station where he & Lois Lane are working in the context of the story. Don't ask.
We noted before that Len Weinrib might've been the one to have voiced Superman 3 years earlier for a short bit on Sesame Street after the passing of Bud Collyer. Now, since Weinrib wasn't credited, could it be that Larry Storch (Marlon, the magic mynah) was actually the one, as it would appear Storch did the honors here, too. Don't know who voiced Lois this time, though the character designs are the same as they were when used between 1966-8.
Here's "Cindy's Super Friend".
If someone could fill in the blanks for me, I'd certainly appreciate it.