Cyberchase

Cyberchase is an Canadian animated educational children's television series on PBS Kids. Co-produced By Nelvana Limited and Thirteen WNET New York And With the Participation of Teletoon In Co-production With PBS Kids And With the Fancai Assistance Of The Shaw Children's Programmee Inatvie And Telefilm Canada The series about three children from Earth: Jackie, Matt, and Inez. They were brought into Cyberspace, a digital universe, in order to protect the world from the villain Hacker (voiced by Christopher Lloyd). These kids are able to prevent Hacker from destroying Cyberspace by means of problem-solving skills with basic math. In Cyberspace, they meet Digit (voiced by Gilbert Gottfried), a cybird that helps them on their missions.
It was first shown on WNET as a "sneak peek" on March 24, 2000, before making its official debut on January 21, 2002. In 2010, after the season eight finale, PBS put the series on hiatus, but it returned in 2013 for a ninth season, followed by a tenth season in 2015. The eleventh season premiered on October 23, 2017. There was a twelfth season that premiered on April 19, 2019.