Plot summary
On Moraband, the homeworld of the Sith, the time has come for Yoda to pass his final test. Only then will he learn the best-kept secret of his order, but first he encounters a vision that heavily foreshadows what is to come—which involves Yoda facing the spirit of Darth Bane. During this time, Darth Sidious summons Count Dooku to his hideout whereupon the duo plan to break Yoda—which stages an inevitable confrontation in the realm of the mind, between the Sith Lords and Yoda alongside Skywalker and his squad. Yoda realizes that—no matter who wins the Clone Wars or what the future holds—there will one day be a new hope.
Credits
Adapted from Wikipedia contributors, List of Star Wars: The Clone Wars episodes. HTML formatting and reference markers removed.