<P> In a medieval yet futuristic world, Clay, Aaron, Lance, Princess Macy, and Axl are five young knights who protect the kingdom of Knighton and its capital Knightonia from Jestro, the Book of Monsters, and their army of Lava Monsters . They also receive help from the Knightonia Royal Family, the digital wizard Merlok 2.0, Robin Underwood, and Ava Prentiss . </P> <P> By the third season, the Cloud of Monstrox appears following his defeat as the Book of Monsters as he once again controls Jestro into helping him obtain the 10 Forbidden Powers where the Cloud of Monstrox uses his evil lightning to animate his Stone Monsters . The two of them later ally with a sculptor named Roberto Arnoldi who helps to sculpt things out of rock for Jestro and Monstrox to use . </P> <P> A 5th season of Nexo knights is set to release on June 21st, 2018 . Monstrux will become a digital virus with the sole purpose of infecting Merlock and taking over the kingdom . </P> <P> The series debuted on Cartoon Network in the United States on December 13, 2015 as Sneak Peek and January 2016 as Official . It premiered on Cartoon Network in Middle East and Gulli in France on December 18, 2015 . Then it premiered Cartoon Network in Central and Eastern Europe on November 28, 2015 . It debuted on Cartoon Network in United Kingdom and Ireland on December 19, 2015 as a Sneak Peek and February 1, 2016 as Official . It premiered on Cartoon Network in Turkey on December 19, 2015 . It premiered on Cartoon Network in Nordic on December 23, 2015 . It premiered on Cartoon Network in Poland on December 26, 2016 as Sneak Peek . It debuted on Teletoon in Canada on January 8, 2016 . It debuted on Cartoon Network in Australia and New Zealand on February 6, 2016 . It premiered on Cartoon Network in Africa on February 27, 2016 . Kix and Pop debut in United Kingdom on March 4, 2017 . </P>

When is nexo knights season 5 coming out