I have seen the ninjago episodes titles and the titles are amazing

Episodes 17-arrival of the Overlord.Probably when he gets his physical form

Episode 21-Lesson in anger
Garmadon teaching Lloyd about his Oni side and learning to harness it

Episode 22-Brave but Foolish is a quote
from a star wars character called 'count dooku' or Darth Tyranous

Episode 24-Return of the ice emereror.
An op Zane coming back but will he Control this power?

Episode 26- Compatible
PIXANE!

Episode 28-Trust problems
Maybe when Harumi joins the ninja and her and Lloyd have to work together.After episode 13 it would be nice to see them together.

I can't show the episode but that is my opinion on most off them.