Ninjago: Masters of Spinjitzu: Season 3 Episode 6

Codename: Arcturus

Lloyd is free but Pythor and the Overlord are nowhere to be found. However, the Ninja have a cryptic clue to their next plan – something called Codename: Arcturus. But what is it? Finding out won’t be easy but it will ultimately take the Ninja to a place they never ever thought they would go.