The Cat in the Hat Knows a Lot About That! is a children's animated television series that premiered in 2010, on August 7 on Treehouse TV in Canada, on September 6 on PBS Kids in the United States and also in the UK on CITV and Tiny Pop. It also aired on YTV in Canada on weekday mornings from 2012 to 2013. The award-winning series is based on Random House's Beginner Books franchise and The Cat in the Hat's Learning Library, itself based on the 1957 children's book The Cat in the Hat. The series is produced by Portfolio Entertainment, Random House Children Entertainment and Collingwood O'Hare Productions in conjunction with KQED, Treehouse TV, and Kids' CBC. The series features famous celebrity Martin Short as the voice of The Cat in the Hat. The first season has 40 half-hour episodes. PBS Kids renewed it for a second season of 20 episodes which premiered on September 10, 2012. The show went on a three-year hiatus before returning for its third and final season of 20 episodes, which premiered on March 2 and ended on October 14, 2018. 80 episodes were produced. Overview Each episode featured The Cat in the Hat who leads neighbors 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 at the beginning of each episode, which inevitably leads them around the globe to make natural science discoveries. Similar to other PBS Kids shows such as Curious George and Sid the Science Kid, The Cat in the Hat Knows a Lot About That! focuses on introducing preschoolers to various science and learning concepts. Episodes Characters Main The Cat in the Hat (voiced by Martin Short) is a knowledgeable, adventurous, anthropomorphic cat. He loves to discover the world and act as Nick and Sally's guide, and he frequently speaks in rhyming patterns reminiscent of the Dr. Seuss character on which he is based. Nick (voiced by Jacob Ewaniuk in seasons 1–2 and Deandray Hamilton in season 3) is Sally's next-door neighbor and best friend. He seems to replace his sole clone, Sally's brother (named Conrad in the 2003 live-action film version), from the books.