Flash season 3
Grant Gustin as Barry Allen in The FlashThe CW/ Warner Bros TV

A new timeline awaits fans when The Flash returns with season 3 on 4 October on The CW Network. Grant Gustin, who plays Barry, spoke about his character's relationship with Iris West, and Joe and Barry's self realisation about the Flashpoint timeline.

Warning: Spoilers Ahead

Gustin spoke to ComicBook.com about the new timeline and revealed that "no one knows that the timeline has been affected other than Barry." He said, "It's a fun thing. When we pick it up, Barry doesn't have any regrets at this point. Barry's been in this timeline for a few months when we start "Flashpoint."

The actor, however, revealed a big spoiler and said that Barry is beginning to forget memories from the other timeline (the one from where he went back and saved his mother in the season 2 finale). The actor said, "He's still living in a complete state of bliss with both of his parents alive. There's a Kid Flash running around as The Flash, so Barry doesn't have to be The Flash and he's okay with that. He still has his powers, but he's starting to forget the other timeline. He's got new memories that are emerging, like graduating high school or college or moments with his parents, and they're replacing old memories."

If you are wondering how long the Flashpoint timeline will go on, Gustin said that when Barry realises how he messed up the timeline he'll try to fix things. The 26-year-old actor said, "And I think it's when he starts to realize that's happening, that's when he starts to realize how selfish this kind of was, how messed up it was. It's affecting not only him and his family's life, but everybody connected to him and — who knows? — countless people across the globe potentially.

"So the incredibly indecisive Barry Allen is going to try to fix things again once he realizes how much this has affected everyone's life." he added.

Flash season 3
Barry Allen and Iris West in The Flash season 2The CW

Speaking about Barry's relationship with Joe and Iris, Gustin said, "Barry's still a CSI, but he never went to move in with them[Joe West's family], obviously, since his mom never died, so they don't have that father/son dynamic at all. They work together, they're barely acquaintances."

"Iris and Barry went to school together, they're also barely acquaintances. But Barry also remembers that conversation on the porch did take place, and he's going to try and force those relationships to happen," he added.