From the Saturday Stumper

Today’s Newsday Saturday Stumper, by Frank Longo, is difficult. A solver who knows something about earthworms, Kentucky history, and defunct television networks may have an advantage, though crosses can make up for the missing knowledge.

A clue I especially liked, in the most difficult (for me) section of the puzzle : 17-Across, five letters: “Big name in little cubes.” RUBIK? No. But so simple once you see it. No spoilers: the answer is in the comments.