Star Wars: The Clone Wars returns this week with the launch of an explosive four-part story arc that puts the clone troopers on the ground of a hostile alien planet while under the command of a ruthless general, Jedi Pong Krell.

Tensions run high as the clones carry out Krell’s difficult orders and embark on the deadly mission to take the capital of Umbara in “Darkness on Umbara,” a new episode of Star Wars: The Clone Wars, airing at 8:00 p.m. ET/PT Friday, October 28th on Cartoon Network.