"Ever since Lord Garmadon retreated to the underworld, peace has spread throughout the land of Ninjago. But now there is a new threat -- Lloyd Garmadon, Lord Garmadon's son! At first, Cole, Jay, Kai, and Zane don't take Lloyd seriously. After all his main goal is stealing candy from villagers. But all that changes when Lloyd accidentally awakens the Serpentine, a race of powerful snake-headed beasts who've been banished for centuries. Can the four...

With their sensei by their side, the ninjas go to the Underworld and face Lord Garmadon to obtain the final golden weapon.

"A little boy explains what it's like to go to school--when you're a ninja"--

Zane, a member of Sensei Wu's team of ninja warriors who has no memories, wants to find answers about his past, but getting them might put the whole team in danger.

Mosquitoes are sneaky and quick and can bite all kinds of other people, but they are no match for a ninja.

One morning, six young ninjas are dropped off at Dojo Daycare. As soon as their ninja moms and ninja dads have left: KABOOM! KAPOW! The ninja boys and girls kick, push, punch, and quickly turn the place upside down in a full-blown ninja riot. Try as he might, the hapless master can't control the children, and the disaster plays out through lunchtime and story time. No one heeds the master's repeated mantra of honor, kindness, and respect -- until...

Shredder has a plan to mutate the city. Can the Turtles stop him?

Wink loves being the most famous ninja in Japan but when he needs a nap his fans will not leave him alone, and so he seeks guidance from his former teacher, Master Zutsu.

Kai, a member of Sensei Wu's team of ninja warriors, helps Zane try to find answers about the past and finds himself in danger.

Sensei Wu must teach the Ninjago warriors the ancient art of spinjitzu in order to defeat Lord Garmadon, but first the ninja Jay, whose sense of humor is strong even in battle, must learn when it is the right time to be serious.