Star Wars Rebels - Episodes 3.21 - 3.22 - Zero Hour Part 1 & Part 2 (Season Finale) - Sneak Peek, Promo, Synopsis

Promo and Sneak Peek
Thanks to Ivan for the heads up.

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Part 1

In final preparations for their attack on Lothal, Phoenix Squadron's plans are disrupted when Grand Admiral Thrawn discovers their location.

Source:

Disney XD

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Part 2

Trapped on Atollon with the rebel base under siege, Hera and Kanan fight to keep the squadron alive as Ezra attempts to rally help from an unexpected source.

Source:

Disney XD