The official synopsis for "The Flash" season three confirms that Barry Allen changes his past and redetermines his future.
Blinded by anger, Barry unwittingly plays into Zoom’s game and uncovers the evil speedster’s true goal: to destroy all Earths in the multiverse. In the race of his life, Barry ultimately gets the upper hand against Zoom and defeats his nemesis.
But unable to celebrate victory, Barry makes a world-shaking decision and speeds back in time to the night his mother died to stop Reverse Flash from killing her, irrevocably changing his past and redetermining his future.
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"The Flash" stars Grant Gustin as Barry Allen/The Flash, Candice Patton as Iris West, Rick Cosnett as Eddie Thawne, Danielle Panabaker as Caitlin Snow, Carlos Valdes as Cisco Ramon, Jesse L. Martin as Detective Joe West, Teddy Sears as Jay Garrick, Keiynan Lonsdale as Wally West, Shantel VanSanten as Patty Spivot, Violett Beane as Jesse Quick, Demore Barnes as Tokamak, and Tony Todd as Zoom.
Recently, CW also unveiled Keiynan Lonsdale as Kid Flash in the upcoming third season of series.
The shocking twist of the season came when Barry ran back in time to the night of his mother's death, and decided to save her - erasing the whole timeline.
Following the shocking season two finale, CW has announced that the series will return for its third season on October 4, 2016.