Kai’s investigation of a Vermillion helmet leads to the discovery that Krux is alive and living under an assumed identity in Ninjago.
Kai’s vision of his parents isn't a true flashback, but rather his mind’s interpretation of the scene, which explains why baby Nya is wearing her modern Water Ninja attire.
Krux (disguised as Dr. Saunders) tells Kai that his parents were traitors who aided the Hands of Time in forging the Vermillion armor. [S7E3] A Time of Traitors
Nya, Jay, and Cole focus on trying to reboot Zane after he was knocked offline in his first battle with the Vermillion. Continuity Features:
Lloyd struggles with his role as a leader in training while Master Wu is incapacitated due to the Time Punch. Kai’s investigation of a Vermillion helmet leads to
Nya confront the new, mysterious Samurai X in the museum.
The golden sarcophagus that traps Cyrus Borg is the same one the Serpentine tried to steal in Season 1, Episode 10 ("Child's Play"). Saunders) tells Kai that his parents were traitors
Here are the key "helpful" features, secrets, and plot points to look for in this episode: