The Cat in the Hat Knows a Lot About That! is an animated musical educational children's television series feature starring Martin Short as The Cat in the Hat. The series premiered on Treehouse TV in Canada on August 7, 2010, also airing on YTV and Nickelodeon Canada on weekday mornings from 2012 to 2013, and on PBS Kids and PBS Kids Preschool Block in the US on September 6, 2010; it also aired on CITV and Tiny Pop in the UK, and Disney Junior India. The 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 was produced by Portfolio Entertainment, Random House Children Entertainment, and Collingwood O'Hare Productions, in conjunction with KQED, PBS, Treehouse TV, and Kids' CBC. The first season has 40 half-hour episodes and ended on September 17, 2012.

In early 2012, the series was renewed a second season of 20 episodes, which premiered on September 10, 2012. After the second season finale, the series stayed in a hiatus until it started a third and final season has 20 episodes. The third season premiered on March 2, 2018.

In September 2018, the series was canceled after three seasons before the finale aired on October 14, 2018.