He watches an episode over and over again until he memorizes it. Then he acts it out. He has a little note pad and a crayon and tries to draw clues then ends up in the recliner, his thinkin' chair.
Unfortunately, he got a little over zealous with his clues and one ended up on the living room wall. His timeout didn't make much of an impression. Clue 2 ended up on the wall of one of our bathrooms. I'm really hoping he doesn't finish the episode which would mean that we'll see a third clue.