Episode Title:Return of the Overlord.Episode Description:The Ninja return to Garmadon's base but find it deserted, as everyone has left for the coast to use Garmatron to upset the balance between good and evil. The Ninja follow, but are stopped by Nya, polluted with Dark Matter. They eventually overcome her and reach the coast, but Garmadon uses Garmatron, infecting the balance. The Overlord then betrays Garmadon, possessing him and attacking Lloyd. Lloyd tries to bring back his father, but the Overlord defeats him, breaking his leg and wrecking the Bounty. The Overlord then opens a portal to Ninjago City and goes through with the Garmatron and his forces, leaving the Ninja stranded on the Dark Island.