Nya, Jay, and Cole focus on trying to reboot Zane after he was knocked offline in his first battle with the Vermillion. Continuity Features:
Krux (disguised as Dr. Saunders) tells Kai that his parents were traitors who aided the Hands of Time in forging the Vermillion armor.
Nya confront the new, mysterious Samurai X in the museum. [S7E3] A Time of Traitors
Here are the key "helpful" features, secrets, and plot points to look for in this episode:
The episode marks the introduction of the Vermillion commanders: Blunck, Raggmunk, and Machia. Nya, Jay, and Cole focus on trying to
Kai’s investigation of a Vermillion helmet leads to the discovery that Krux is alive and living under an assumed identity in Ninjago.
The golden sarcophagus that traps Cyrus Borg is the same one the Serpentine tried to steal in Season 1, Episode 10 ("Child's Play"). Nya confront the new, mysterious Samurai X in the museum
Nya fights possessed samurai armor at the museum while investigating the Vermillion's activities. More details on the Time Twins' history ? A summary of what happens in the next episode ? "Ninjago" A Time of Traitors (TV Episode 2017) - IMDb