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

Barry Allen's decision to go back in time and save his mother, Nora Allen, will have severe repercussions in The Flash season 3 premiere. Actor Matt Letscher, who plays the Reverse Flash/ Eobard Thawne, teased that Barry is in trouble in the third season's opening episode.

Letscher was asked to sum up the season 3 premiere episode during an interview with ComicBookresources. The actor said, "In three words, can I sum up "The Flash" season premiere... I'm not great at this, but I would say, 'Barry's in trouble. Barry's in trouble!'"

Season 3 of The Flash will pick up with Barry and Thawne living in the Flashpoint timeline for a few months, but that doesn't mean they will bond. According to Letscher, the Flash and Reverse Flash will never see eye-to-eye on anything.

The actor said, "You may have noticed in the sizzle that I'm in a cage! That's an impediment in our relationship. It's not making us any closer. I don't think the Flash and Reverse Flash will ever see eye-to-eye on anything. I think that's something we'll continue to see as the show goes on."

Contrary to the relationship between their on-screen characters, Letscher and Gustin share a good rapport. The 46-year-old actor praised Gustin and said, "Oh, I love Grant! Grant has a huge workload on his shoulders with this show."

Flash season 3
Matt Letscher as Reverse Flash in The Flash season 3 trailer The CW/ Warner Bros TV/ Screenshot

"It is a tremendously labor-intensive show for him, and he handles it with incredible grace and professionalism and I think he's really talented. I just so enjoyed the stuff I had to do with him in the season premiere. I just can't say enough good things about the guy. I think he's super talented," he added of The Flash actor.

The Flash will have crossover episodes with Supergirl and Arrow this year, and Letscher is on board for the mashup occasions. "Absolutely! I want to complete the foursome. I want the whole set on my resume! I would love for that to happen. You know, there's a lot of crossover happening this year, so there's a decent chance I've got a shot at it. We'll see!"

The Flash season 3 premieres on 4 October on The CW network.