The Flash “Girls Night Out” episode synopsis:
KATEE SACKHOFF (“BATTLESTAR GALACTICA”) AND EMILY BETT RICKARDS (“ARROW”) GUEST STAR — 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. Laura Belsey directed the episode written by Lauren Certo & Kristen Kim (#405). Original airdate 11/7/2017.
DC’s Legends of Tomorrow “Return of the Mack” episode synopsis:
When Nate (Nick Zano) thinks he has found a pattern to the anachronisms, it leads the Legends to London in 1897 to hunt down a time-traveling vampire. When they arrive in London, they run into Rip (guest star Arthur Darvill), but not everyone welcomes him back so quickly, leaving Sara (Caity Lotz) to make a tough choice in the end. Amaya (Maisie Richardson-Sellers) tries to connect with Zari (Tala Ashe), but she is still struggling with being part of the team. Meanwhile, Stein (Victor Garber) discovers what Ray (Brandon Routh) and Jax (Franz Drameh) are up to and is not entirely pleased. Dominic Purcell also stars. Alexandra La Roche directed the episode written by Grainne Godfree & Morgan Faust (#305). Original airdate 11/07/2017.
The Flash airs Tuesdays at 8pm EST followed by Legends of Tomorrow at 9pm EST on The CW.