As fans count down the days until the Sept. 24 premiere, Disney XD has unleashed a tense new teaser for the upcoming third season of "Star Wars Rebels."

Titled "Enter Thrawn," the 44-second promo of course focuses on Grand Admiral Thrawn, the fan-favorite villain from the Expanded Universe voiced here by Lars Mikkelsen.

"To defeat an enemy, you must know them," Thrawn says in voiceover. "I will pull the Rebels apart ... piece by piece. They will be the architects of their own destruction."

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The hour-long Season 3 premiere, "Steps Into Shadows," will introduce not only Thrawn but a mysterious Force-wielder played by “Doctor Who” veteran Tom Baker.

"Star Wars Rebels" returns Saturday, Sept. 24, at 8:30 a.m. ET/PT on Disney XD.

Having established a secret base on Atollon, the Ghost crew, now led by a more powerful Ezra, strengthens the rebel fleet by acquiring new resources and recruits eager to stand against the Empire. However, the Imperial efforts to eliminate the rebellion are now being led by the coldly analytical Grand Admiral Thrawn, whose strategic, tactical and cultural insights make him a threat unlike any they have faced before. In season three, Ezra and Sabine take on new roles and challenges as the rebels prepare for their biggest mission yet – a direct assault on the Empire.