Captain Midnight’s most dastardly villain turned out to be his ex-sponsor, Ovaltine, who owned all the rights to the name. When the television show (he appeared on radio, in the comics, and there was a serial and newspaper strip), went into syndication, Ovaltine forced a name change to Jet Jackson, Flying Commando (see Nostalgia Central). Here is the official code book and membership manual for secret squadron members (you know who you are).
ComicRack reader version: Download Captain Midnight Club Handbook