History of Jay (Sons of Garmadon)

Dead Man's Squall
While discussing the map found on the baby's blanket, Jay was too busy, trying to get a meatball before accidentally stabbing Kai's hand with his fork.

The Quiet One
As they tried to fix the Bounty, the baby, who had a growth spurt, hands him a pair of pliers, surprising him and the others. Proclaiming he is quitting, the baby soon said their motto: "Ninja never quit". Shocked, Jay announces to his friends (who also realize) that the baby is a regressed Master Wu.

The Ninja tell Nya the things the baby did and how they discovered he is Wu, she doesn't believe that he is actually Wu. However, she soon does believe after she hears the baby talk and drink tea like her master does.

The Ninja watched him go for more tea, which Jay refills for him. Afterwards, questions are raised by how Wu reverted to a toddler; Nya deduced it was because he touched the Reversal Blade before he was lost in time. Zane states if Nya's theory is correct, the blades' effects have worn off and now Wu will keep aging until he returns to normal, eventually. Jay wondered how long it would take as P.I.X.A.L told him time will tell.

The Ninja later discover Harumi is the Quiet One as the Sons of Garmadon attacked and surrounded them.

Dread on Arrival
They ride the Sea Creature back to Ninjago after taming it and head to the police station. When denied entry into the Commissioner's office, Jay threatened the officer with zapping, doing so before they enter. When the Commissioner refers a pirate genie, Jay and Nya smile at each other as only they remember the events.