The CW have released preview images for this week's episode of Arrow, titled "Heir to the Demon." You can see them below. The episode will air on Wednesday night at 8 p.m. EST, guest-starring Spartacus's Katrina Law as Nyssa Raatko (the daughter of Ra's al Ghul) and directed by Wendey Stanzler, who helmed the fan-favorite "League of Assassins" episode earlier this year. Here's the official description: ALEX KINGSTON AND KATRINA LAW ("SPARTACUS") GUEST STAR — As Laurel (Katie Cassidy) continues to unravel, Oliver (Stephen Amell) and Lance (Paul Blackthorne) try to convince Sara (guest star Caity Lotz) to stay in Starling City and finally reunite with Laurel and Dinah (guest star Alex Kingston). However, Sara's fellow League of Assassins member, Nyssa (guest star Katrina Law, "Spartacus"), comes to bring Sara back to the fold, but when Sara refuses, Nyssa kidnaps Dinah. Realizing she's putting her family in danger by staying in town, Sara considers re-joining the league. Wendey Stanzler directed the episode written by Jake Coburn (#213).