Season 1: The high-tech Kingdom of Knighton is in trouble. The King's jester has stolen the strange talking Book of Monsters. Using its evil magic, he summons an army of dangerous Lava Monsters and attacks. But who is the real enemy mastermind, Jestro or the Book of Monsters. Season 2: Now an efficient monster-fighting unit, can the Nexo Knights prevent Jestro, the Book, and their monster army from conquering the entire kingdom?

Title from container. Originally broadcast as 20 episodes of a television program on The Cartoon Network.

Season 1, Disc 1.The book of monsters, part one ; The book of monsters, part two ; The power of Merlok ; The knights' code ; Fright knight -- Season 1, Disc 2. The golden castle ; The maze of amazement ; Black night ; The book of total badness ; The might and the magic -- Season 2, Disc 1. Back to school ; Greed is good? ; The book of obsession ; The king's tournament ; Monster chef -- Season 2, Disc 2. Knight out ; Saturday knight fever ; Open mike knight ; The fortrex and the furious ; Kingdom of heroes.