Season one had 13 episodes, and followed the ninjas' quest to stop the evil Serpentine. The second season continued with the ninja training the green ninja to defeat Lord Garmadon once and for all. The third season depicts Ninjago City with cutting-edge technology and the Overlord's return. The fourth season reveals the existence of other elemental masters. Season 5 reveals that there are sixteen realms, and also introduced the Preeminent. Music and sounds are done by Jay Vincent, Michael Kramer, and JAM Music and Effects.