MP4: The Flash Season 3 Episode 1 (S03E01) - Flashpoint

Barry is living his dream life - his parents are alive, he's asked Iris West on a date and he can finally be a normal guy as Central City has another speedster, Kid Flash, running around saving the city. When Barry starts forgetting parts of his old life, the Reverse Flash taunts his nemesis and tells him that there will be serious repercussions for Barry and the ones he loves if he continues to live in this alternate universe. In addition to losing his memories, his powers will also start to fade. When disaster strikes, Barry must decide if he wants to continue to live in this world as Barry Allen or return to his universe as The Flash.

The Flash 2014 Season 3, Episode 1 - Flashpoint
Air date: Oct 4, 2016