from StarWars.com:
After groundquakes have devastated the planet Aleen, a Republic relief effort arrives, including the 104th battalion of clone troopers along with droids R2-D2 and C-3PO. When the native Aleena’s pleas go unheard, it becomes the duty of the droids to embark on a surreal journey through Aleena’s subterranean world to save the planet, in “Mercy Mission” a new episode of Star Wars: The Clone Wars, airing at 8:00 p.m. ET/PT Friday, October 7th on Cartoon Network.