Fans of "Arrow" will finally see the A.T.O.M in full gear and armor while Nyssa vows to seek vengeance against Oliver McQueen in Wednesday's all-new episode of "Arrow."

In the last week's episode, "The Return," Oliver and Thea had a showdown with Slade "Deathstroke" Wilson on Lian Yu. As a result, Thea learned the truth about her biological father, Malcolm Merlyn, who used her to kill Sara Lance, reports Cinema Blend.

In addition, Oliver traveled to the past to discreetly checked in on his loved ones in Starling City and stop China White from selling the Omega virus.

The upcoming episode of "Arrow," which is titled "Nanda Parbat," will bring viewers into the future. Not only will this mark the debut of the completed A.T.O.M. suit, but Oliver will face off with Ra's al Ghul.

Meanwhile, Oliver and Diggle will try to rescue Malcolm from Ra's al Ghul's stronghold in the titular city. Thea will also hand Merlyn over to the League. However, Oliver and will ironically rush to try and save him, reports Movie Pilot.

According to SuperHeroHype, the CW's official press description for "Nanda Parbat" reads as follows:

"Malcolm (John Barrowman) is captured by Ra's al Ghul (guest star Matt Nable) and taken to Nanda Parbat. Because of his love for Thea (Willa Holland), Oliver (Stephen Amell) considers saving Merlyn. Ray (Brandon Routh) is obsessed with finishing his Atom suit so he can save the city but Felicity (Emily Bett Rickards) fears he is heading down the same path as Oliver (Stephen Amell) and tries to pull him out of the lab."

"Arrow" Season 3, Episode 15, "Nanda Parbat," airs on Wednesday, Feb. 25, at 8 p.m. ET on The CW.

Watch promo videos below.

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