The Flash Season 1, Episode 23, titled serves as the high-stakes season finale that first aired on May 19, 2015. The episode centers on a pivotal moral and scientific dilemma: Barry Allen must decide whether to travel back in time to save his mother, Nora Allen, from being murdered by Eobard Thawne (the Reverse-Flash). Plot Summary
The finale begins with Eobard Thawne imprisoned in the S.T.A.R. Labs pipeline. He offers Barry a deal: if Barry uses the particle accelerator to reach a specific speed and creates a wormhole, he can travel back to the night of his mother's murder. In exchange, the wormhole will allow Thawne to return to his own time in the 22nd century. The Flash Season 1, Episode 23, titled serves