As Kate Kane continues to settle into her role as Batwoman, Gotham City's protector, she finds herself face-to-face with one of Batman's familiar foes.

The CW has released a promo for the Arrowverse series' fourth episode, titled "Who Are You?" which sees Batwoman interrupt a heist at an art museum carried out by Magpie, portrayed by guest star Rachel Matthews. The character was created by John Byrne and debuted in 1986's The Man of Steel #3 as a deadly jewel thief operating in Gotham.

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While Batwoman fights the deranged villain, Alice and her Wonderland Gang are seen menacing Catherine Hamilton-Kane, creating a strain between her and her husband Jacob Kane, Kate's father and the leader of a security team in Gotham known as the Crows.

It's unknown if Magpie fought against the Arrowverse's Batman before his mysterious disappearance three years prior to the introduction of Batwoman. Nevertheless, boasting formidable fighting moves of her own, Magpie laughs off Batwoman's kicks, hinting at a tough battle ahead for the new Caped Crusader.

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Helmed 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.