In upcoming Flash episode “Girls Night Out,” Barry and Iris will each be taken for a night on the town ahead of their wedding ceremony. But making the occasion even more momentous are guest appearances by Emily Bett Rickards as Felicity Smoak and Kate Sackhoff as Amunet Black, aka Blacksmith.

We're guessing Barry Allen & Co. will be more pleased by the attendance of one than the other.

RELATED: The Flash Enlists Katee Sackhoff As DC Comics Villain

The addition of Sackhoff (Battlestar Galactica, Longmire) as the DC Comics villain was announced in August. Created by Geoff Johns and Ethan van Sciver, Blacksmith was introduced in 2001’s The Flash: Iron Heights #1, where she was a master strategist with the ability to control metal and mold it around her body. She formed a new version of the Rogues in her bit to take control over Central City and Keystone City. On The CW drama, as in the comic books, Blacksmith is Amunet Black, the tough-as-nails boss of a black market for supervillains.

The episode's official synopsis provides more detail:

Having received an ominous threat from her old boss, Amunet (guest star Katee Sackhoff), Caitlin (Danielle Panabaker) fears that her past time as Killer Frost may be back to haunt her. Felicity (guest star Emily Bett Rickards) comes to Central City to help the girls celebrate Iris’s (Candice Patton) bachelorette party, while Cisco (Carlos Valdes), Joe (Jesse L. Martin) and the guys take Barry out for a night on the town.

“Girls Night Out" will debut Nov. 7. Airing Tuesdays at 8 p..m. ET/PT on The CW, The Flash stars Grant Gustin as Barry Allen, Candice Patton as Iris West, Jesse L. Martin as Joe West, Tom Cavanagh as Harrison Wells, Carlos Valdes as Cisco Ramon, Danielle Panabaker as Caitlin Snow and Keiynan Lonsdale as Wally West.