(WARNING: All of the characters are over +18, meaning all of them are adults) Nexo Knights (stylized as NEXO KNIGHTS) is a CGI comedy-action fantasy sci-fi television series produced by M2 Entertainment and LEGO, created to tie in with the accompanying LEGO theme. The series, being LEGO's second foray into digital integration following Ultra Agents, employed the use of a mobile game to combine the experience of the series, sets and play. The two pilot episodes, The Book of Monsters - Part 1 and Part 2, first aired on December 13, 2015. The first season then followed, continuing in January 2016. The series concluded on September 1, 2017, after its fourth season; while it was intended to have two more seasons running in 2018, the series ended production due to budgetary issues.