As Kate Kane steps up to protect Gotham City under the mantle of Batwoman, the is poised to face off against one of the Dark Knight's old enemies in an upcoming episode.

The CW has released the official plot synopsis for the Arrowverse series' fourth episode, titled "Who Are You?," revealing Kate to be working with Luke Fox to apprehend Magpie, with the villain on a one-woman crime spree more than her usual modus operandi of stealing shiny objects.

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BATWOMAN

“Who Are You?” — (8:00-9:00 p.m. ET) (TV-14, DLV) (HDTV)

ALL THAT GLITTERS – A new villain with an eye for all things that sparkle drops in on the city. Kate (Ruby Rose) attempts to find a balance between her personal life and her new role as Gotham’s guardian. Catherine (Elizabeth Anweis) has an uncomfortable encounter with Alice (Rachel Skarsten) who always seems to be one step ahead of the Kane family. Batwoman pays fangirl Mary (Nicole Kang) a visit to ask for a favor. Meanwhile, Jacob (Dougray Scott) and Sophie (Meagan Tandy) try to piece together who was after their prisoner. Luke (Camrus Johnson) continues to finetune Batwoman’s arsenal of weapons as the pair track their unwelcome visitor and discover she has more sinister plans than snatching shiny objects. Holly Dale directed the episode written by Nancy Kiu and Denise Harkavy (#104). Original airdate 10/27/2019. Every episode of BATWOMAN will be available to stream on CWTV.com and The CW App the day after broadcast for free and without a subscription, log-in or authentication required.

Magpie's inclusion in the DCTV series was previously confirmed in official stills being released from the episode, showcasing Rachel Matthews guest-starring in the villainous role. A promo for the series also briefly included a clip of Magpie eluding Batwoman in a museum.

While Batwoman contends with Magpie, Alice will find herself moving closer to the Kane family as Catherine has an uncomfortable encounter with the leader of the Wonderland Gang.

RELATED: Batwoman's Alice Reveals Her Vengeful Plan

Written by Caroline Dries and developed by Berlanti Productions and Warner Bros. Television, Batwoman stars Ruby Rose, Rachel Skarsten, Meagan Tandy, Camrus Johnson, Dougray Scott, Elizabeth Anweis and Nicole Kang. The series airs Sundays at 8 p.m. ET/PT on The CW.