"The Flash" cast and crew are hard at work in Vancouver knocking out the rest of the episodes of the CW series' third season. That work, of course, includes major stunts and plenty of people in superhero suits -- and a new batch of set photos from HollywoodNorth.buzz contain both of those things. RELATED: The Flash: First Look at Gorilla City’s Solovar RevealedThe new shots from "The Flash's" set include a number of costumed heroes, including the Flash, Kid Flash, Vibe and Gypsy. They also include a mystery white-haired character right in the middle of the action.

It's not yet been revealed who this character is or who is playing him; it's possible that the actor seenin the photos above is a stunt performer. Just to speculate, the character could be the white-haired Justice League villain called Key, or it's always possible that he's a villain from an alternate Earth.

Additionally, it's worth pointing out that Kevin Smith was seen in the area of filming as well, leading some to speculate that the director is stepping behind the camera one more time.

Smith has so far directed two episodes of "The Flash," including an episode earlier this season titled "Killer Frost." More recently, Smith directed an episode of fellow CW/DC series "Supergirl" titled "Supergirl Lives."

Starring Grant Gustin as the Scarlet Speedster, "The Flash" airs Tuesdays at 8 pm ET/PT on The CW. The series also stars Jesse L. Martin, Tom Cavanagh, Carlos Valdes, Candice Patton, Danielle Panabaker, Keiynan Lonsdale and more.