Only one man can save the day in this week's Arrow, and no, it's not Oliver Queen.

After Laurel (Katie Cassidy) uses the Lazarus Pit to bring her sister back from the dead, the team has to deal with Sara's (Caity Lotz) feral reaction to the Pit. When she escapes from Laurel's apartment, it becomes clear that only John Constantine (Matt Ryan, from NBC's canceled Constantine) can help return Sara to her real self. After all, he's the guy who handles supernatural threats that break through to our world.

"We feel very lucky," Arrow executive producer Wendy Mericle says of adding the character in the clip below. "It's just a fun, different dynamic to have on the show."

Take a look at a preview for this week's episode:

Are you excited to see Constantine on Arrow?

Arrow airs Wednesdays at 8/7c on the CW.

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