The Cat in the Hat Knows a Lot About That! has 40 half-hour episodes. PBS Kids renewed it for a second season of 20 episodes which premiered on September 10, 2012. A 20 episode third season is currently in development. Each episode features The Cat in the Hat (voiced by Martin Short), who leads neighbours Nick and Sally, the Fish, and Thing One and Thing Two on a variety of adventures in his "Thinga-ma-jigger", a Seussian contraption that can sprout wings, pontoons, booster rockets, change size, and do just about anything else necessary to further the adventure. The adventures are prompted by a question posed by either Nick or Sally
The Cat in the Hat Comes Back then a pan, and finally outside. Seeing the spot cover the snow, Little Cat C lifts his hat to reveal Little Cats D through G. The seven Little Cats wage war on the snow spots, shooting at pink snowballs with pop guns. This only spreads the spots more, so Little Cat G lifts his hat to reveal Little Cats H through V. All the cats work more, but the spot keeps spreading, until all the snow is pink, so Little Cat V takes off his hat to uncover Little Cats W, X, Y and the microscopic Little Cat Z. Z