The Flash Season 9 Trailer Release (The CW)

The Flash's last season pits Barry Allen (Grant Gustin) against another speedster to save the timeline.

The CW released a ninth-season trailer.

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Barry's "Map Book" predicts events in the new trailer.

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Iris West-Allen (Candice Patton) is pregnant in three months.

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Barry says in the new footage that an unnamed speedster wants to develop a time machine, threatening the entire history.

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The trailer introduces Richard Harmon as Captain Boomerang.

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Since the first season, Pied Piper/Hartley Rathaway (Andy Mientus) has battled the Flash.

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"Let's do this one last time," Barry says as the trailer ends with The Flash.

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"Let's do this one last time," Barry says as the trailer ends with The Flash.

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