Nyssa Al Ghul, Katrina Law

The daughter of Ra's al Ghul is coming to Starling City — but it's not exactly who you'd expect.

Spartacus alum Katrina Law has been tapped to play Ra's al Ghul's other progeny, Nyssa al Ghul, on Arrow, TVGuide.com has learned exclusively.

On The CW series, Nyssa is a powerful member of the League of Assassins who comes to Starling City in pursuit of The Canary (Caity Lotz).

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In the comics, it's revealed that Ra's al Ghul had a love child while traveling through Russia, making Nyssa the half-sister of Talia al Ghul, whom Marion Cotillard portrayed in The Dark Knight Rises. With Nyssa coming to town, it may give some credence to a popular theory that Isabel Rochev (Summer Glau) is secretly Talia — or we could just be crazy!

Law, whose other credits include Legend of the Seeker and Chuck, will first appear in the 13th episode of Season 2, aptly titled "Heir to the Demon." Law's casting marks yet another Spartacus reunion of sorts. Manu Bennett plays series regular Slade Wilson and Cynthia Addai-Robinson recently joined the cast as Amanda Waller.

Arrow airs Wednesdays at 8/7c on The CW. Are you excited to meet Ra's al Ghul's other daughter?

(Full disclosure: TVGuide.com is owned by CBS, one of The CW's parent companies.)