Captain Midnight

Captain Midnight was based on a WWII era Radio Show of the same name (just updated for TV). The Radio show and the original TV Airing was sponsored by Ovaltine which marketed "Secret Decoder Ring" and Badge tie-ins during the Radio show (and I think the TV Show). There was also a fan club that allowed you to be a member of Captain Midnight's "Secret Squadron". They owned the character name. When the show went into syndication, they were no longer the sponsor so the syndicated versions had to have the name altered (to Jet Jackson). One of the changes that was made in the TV Show (from the Radio Version) was the alteration of the Secret Squadron serial numbers from SS-X (Captain Midnight was of course SS-1) to SQ-X due to the SS reference being in poor taste due to WWII Nazi associations.