Arrow Season 4 Episode 12 Sneak Preview: Unchained

The CW has released a sneak preview for next Wednesday's Arrow episode, titled "Unchained."

ROY HARPER RETURNS; NYSSA MAKES HER MOVE — The team faces off against a formidable villain nicknamed The Calculator (guest star Tom Amandes). Meanwhile, Nyssa (guest star Katrina Law) makes her move and Roy Harper (guest star Colton Haynes) returns to Star City.

Check out the "Unchained" trailer in the video below.

Kevin Fair directed the episode written by Speed Weed & Beth Schwartz.

"Unchained" episode Arrow will air Wednesday, February 3 at 8PM on The CW.