I very vaguely remember seeing some sitcom in the mid-1960's where the kids were watching a goofy superhero show on TV. This was probably it. I remember watching Mr. Terrific, and seeing ads for Captain Nice. Both were spoofs of the 1966 Batman/superhero fad. Of course, the fad passed, and parodies of it became irrelevant.
Precursor to Captain Chaos. Dun Dun DUNNNNNNNNN!