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The episode ends with the reveal that the team needs a power source stronger than the sun to fuel the Speed Force Bazooka—specifically, a Dominator crystal guarded by King Shark .

Grant Gustin is praised by reviewers from TV Fanatic for his comedic performance as "Bart," a version of Barry unburdened by the tragedy and "brooding" of recent seasons. The_Flash_2014_3x21_Causa_Ed_Effetto_ITA_1080p_...

Because Barry loses his memory, Savitar also loses his, rendering him a non-threat temporarily. However, this also causes Wally West to lose his powers, as his speed was a direct result of Savitar's actions in the timeline. The episode ends with the reveal that the