ThunderCats is a science fantasy animated television series, developed by Ethan Spaulding and Michael Jelenic for Cartoon Network. A reboot of the original 1980s TV series of the same name (which ran from 1985 to 1989), ThunderCats was produced by American studio Warner Bros. Animation and animated by Japanese studio Studio 4°C, and combined elements of western animation with Japanese anime. The series began with an hour-long premiere on Cartoon Network on July 29, 2011. It is the final animated collaboration of both Arthur Rankin Jr. and Jules Bass, as the former died on January 30, 2014, and the latter died on October 25, 2022.

Following the destruction of their home, the kingdom of Thundera, the ThunderCats (a group of humanoid felidaes) are forced to roam the planet Third Earth, in order to find a way to defeat the evil sorcerer Mumm-Ra, who plans on taking over the universe. Story-wise the series attempts to take a much darker and more cinematic approach than the original show, featuring a lot more focus on characterization and more sophisticated themes.

Initially planned for 52 episodes, the show was cancelled after only one season, as confirmed by ThunderCats art-director Dan Norton in early 2013. Reruns of the show later aired on Adult Swim's Toonami block along with Sym-Bionic Titan.