When The Flash returns for Season 4 this fall, the West family will step up in the face of Barry's absence. Candice Patton's Iris West will lead the team from STAR Labs and Wally West (Keiynan Lonsdale) will take over Barry's role as Central City's speedster hero, all while their father Joe West (Jesse L. Martin) watches over both his children. At Comic-Con International in San Diego, the three Flash stars weighed in on how their new status quo will change the West family's dynamic on the series.

Asked how Iris' new leadership role will impact her relationship with her brother Wally, Patton said, "I think it's a great dynamic, because now they get to work a little more closely together. Kid Flash has kind of had to step up to take over Barry's shoes, and so now Wally and Iris are kind of co-workers, essentially. That kind of dynamic we saw in the Flashpoint episode, this brother-sister team up, which is really cool."

RELATED: The Flash Cast Reveals How the Team Copes With Barry’s Absence

"I think it's a great dynamic, because now they get to work a little more closely together," she added. "Kid Flash has kind of had to step up to take over Barry's shoes, and so now Wally and Iris are kind of co-workers, essentially. That kind of dynamic we saw in the Flashpoint episode, this brother-sister team up, which is really cool."

Lonsdale agreed with that assessment on Wally's behalf. "It only makes it stronger, I think. I think [Wally] definitely feels even more closer, especially to Iris, because he knows what she's going through," he explained, referring to how Wally lost his mother. "Even if they may not talk about it, they can vibe each other. He's really looking out for her best interests, so I think a lot of -- even in a sense of being this team -- he also knows how much that means to her, dealing with this whole loss of Barry."

RELATED: The Flash: Barry Will Be ‘Wiser,’ More ‘Positive’ in Season 4

"Joe takes a bit of pride in both the kids, because Iris sort of takes over at STAR Labs and she becomes more of a leader there," Martin shared. "She's sort of calling the shots for the entire team. Wally is stepping up. I mean, I think one of the things we did in the show that I didn't particularly love is we sort of infantilized Wally. He was always the kid. Of course, he's Kid Flash, but still! He's a growing man. So Joe gets really proud to see Wally step up and actually be the superhero that he always wanted to be."

Starring Grant Gustin as the Scarlet Speedster, The Flash returns Tuesday, October 10 at 8 p.m. ET/PT on The CW. The series also stars Jesse L. Martin, Tom Cavanagh, Carlos Valdes, Candice Patton, Danielle Panabaker, Keiynan Lonsdale and more.