'The Flash' EP On Next Week's Costume-Free Episode and the Upcoming Crossover

10/30/2017 06:09 pm EDT

The November 6 episode of The Flash is titled "Girls Night Out" and in addition to introducing Katee Sackhoff as the villainous Amunet Black, the episode will also feature a Flash first: The red costume worn by Barry Allen (Grant Gustin) is nowhere to be seen -- at least as far as it comes to being worn by its familiar owner.

"We wanted to do something we'd never done before. It's interesting, because I think it's the first episode we've ever done where Barry doesn't wear the suit," Flash Executive Producer Andrew Kreisberg told a room full of press following a screening of this week's new episode of the show, "Elongated Journey Into Night."

"We started with the concept of 'wouldn't it be really funny if Barry goes for a bachelor party with the guys, and Iris goes for a bachelorette party with the girls, and the guys end up having the worst night ever and the girls end up saving the city'?" Kreisberg says about the development of the episode. "That was where the episode started from, and that's where it ended up."

Kreisberg has nothing but praise for Katee Sackhoff's work on The Flash, which will see her appearing in multiple episodes. "What she's done and the performance that she has brought to the character is so beyond anything you expect from her. I think people are really gonna be delighted. She is most definitely not playing Starbuck," Kreisberg teases.

"Girls Night Out" features a guest appearance by Arrow's Emily Bett Rickards as Felicity Smoak; a precursor to a much larger crossover that will air in late November.

"It's really good," Kreisberg promises of this year's four-show event.

"It really truly is a four hour movie in a way that we've never done before. Starting even with the original Flash and Arrow one we did four years ago, the storylines were very loosely connected. Even last season, it very much felt like an episode of The Flash, and then it was definitely and episode of Arrow, and then definitely an episode of Legends," Kreisberg admits.

"This time around, you won't know what show it is depending on what episode it is. There's a beginning to the story and there's an end to the story and it covers the four hours. For that, we're really proud. It's huge, it's the biggest thing we've ever done, and it's nearly killed all of us," the producer adds.

The Flash airs Tuesday nights at 8 p.m. ET/PT on The CW.

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