In "The Flash" Season 2 finale, Barry changed everything -- literally! -- when he went back in time and saved his mother from being murdered. According to star Grant Gustin, the ramifications of that action will be felt throughout Season 3, but it won't last all year -- even though some of those repercussions are permanent.
"[Season 3] is pretty 'Flashpoint' focused right now, which I think we are going to see the repercussions coming out of 'Flashpoint,'" Gustin told director Kevin Smith, who was interviewing him on behalf of IMDb. "There will be ramifications all season long from 'Flashpoint.'"
"I think we can state... 'Flashpoint' does not last all season long," he added. "But there are permanent ramifications."
He also weighed in on Barry's motivations to change the timeline, saying, "People were like, 'Why did he do that?' And I think that he wasn't going to do that, but I think that sitting on that porch, having just defeated Zoom, Iris says to Barry what he's always wanted to hear, and he feels empty inside," explained Gustin. "That was the moment... As selfish as it was that Barry wanted his parents, I think it's more about 'these two speedsters took away their life because of me and they deserve to have a chance at life. I can't do this, I need to give them that chance.'"