I don't remember which channel it was specifically, but I happened to catch one of those style of documentaries (probably something about string theory because that's the only thing deep pop physics seems to want to cover). The basic style of the show was "commercials, recap of last segment, frame a question, have the expert talk about it for like 30 seconds, voiceover recap of that response, lofty question to leave you wanting to come back after the commercial break, commercial break" (rinse and repeat until hour timeslot is filled). And in one of those segments, the managed to have the leaving question ask the thing they just answered earlier that segment.
So don't hold your breath that the various science channels are doing much better.