AceShowbiz -

Here comes the time when Felicity Smoak's IT skills are very much needed in fighting against a villain in Star City. In the next episode of "Arrow", a bad guy who calls himself The Calculator (played by Tom Amandes) spreads a terror in the city via a website.

As reported before, The Calculator is "a criminal mastermind and technical genius" who "uses his advanced skills in computer science and internet manipulation to blackmail Roy out of retirement to do his bidding, which leads to an epic battle with Team Arrow." Colton Haynes is set to reprise his role as Roy in the episode, but he's not seen in a preview for the episode.

"Unchained" airs Wednesday, February 3 at 8/7c on The CW. When the team faces off against a formidable villain nicknamed The Calculator, Nyssa (guest star Katrina Law) makes her move and Roy Harper returns to Star City.

The latest episode which aired on January 27, meanwhile, ended the speculation about whether Felicity who now uses a wheelchair will become Oracle, the alias Barbara Gordon took on after she was paralyzed. Felicity's codename is Overwatch, which is the title of "Arrow" executive producer Marc Guggenheim's CIA conspiracy novel.

Asked why they didn't call Felicity "Oracle", Stephen Amell enthused, "I was gonna go with Oracle, but it's taken."