: The mysterious host and primary antagonist of the season.
This episode, also known as episode 35 of the overall series, serves as the premiere for the "Tournament of Elements" story arc. It originally aired on February 23, 2015. [S4E1] The Invitation
: Following the sacrifice of Zane in the previous season, the Ninja team has disbanded. Lloyd, the Green Ninja, attempts to reunite his friends, who have moved on to other lives—Jay is a TV host, Cole is a lumberjack, and Kai is a slasher-flick fighter. : The mysterious host and primary antagonist of the season