Grant Gustin Teases 'Big Twist' Coming Up on 'The Flash' That Even Surprised Him!

Grant Gustin bundles up over his costume while filming The Flash on Monday afternoon (January 19) in Vancouver, Canada.

The 25-year-old actor was joined on set for the all-day shoot by his co-stars Danielle Panabaker and Carlos Valdes, as well as newbie Peyton List, who sported a blonde wig, and Wentworth Miller, who stopped to sign autographs for fans.

That same day, Danielle was spotted walking out and about after work, while Candice Patton hit up a local Lamborghini dealership.

“Barry is still defending Wells and still trusting of Wells at this point,” Grant recently told EW. “There’s a big twist that even surprised me. I’ve seen all the predictions online. No one has predicted the big twist that’s coming at the end of this season.”

45+ pics inside of The Flash out and about in Vancouver…