showrunner Eric Wallace tells EW.

“That’s the second biggest storyline in ‘Armageddon’: the personal Armageddon of marriage.

In fact, Despero has a very specific bone to pick with Central City’s speedy hero.

The Flash

Katie Yu/The CW

Just look at the place of prominence she occupies on the team-up focused poster for the saga.

“There’s a reason why Iris is on that poster,” says Wallace.

Barry can’t stop ‘Armageddon’ without his rock and lightning rod, Iris.

The Flash

The CW

The producer was very impressed by Gustin and Patton’s performances across the five episodes.

“There’s some pretty meaty scenes going on here.

Danielle Nicolet, who plays Cecile Horton, also gets a moment to shine in “Armageddon.”

The Flash

Danielle Nicolet as Cecile, Grant Gustin as Barry Allen, and Danielle Panabaker as Caitlin Snow on ‘The Flash’.Katie Yu/The CW

Tom Cavanagh and Neal McDonough will appear as frequent Arrowverse baddies Reverse Flash and Damien Darhk, respectively.

The Flashairs Tuesdays at 8 p.m. on the CW.