The next episode, 'Taken,' of season 4 of Arrow is going to be a very intense and emotional ride, as Damien Darhk (Neal Mc Donnough) will get his hands on someone that's very very dear to Oliver (Stephen Amell).

Is Roy Harper The Person In The Grave?

The preview for the episode reveals that Darhk has kidnapped Oliver's son. In a poignant scene Darhk tells Oliver, who is by Felicity (Emily Bett Rickards) that he has "kidnapped William." Felicity asks Oliver who William is, at which point Oliver makes the big revelation to her.

Through the clip Oliver is seen trying to rescue his son and ensuring he is safe. While this is a major twist in the plot and will definitely affect Oliver and Felicity's relationship, it has got us wondering if Oliver's son might be the person in the grave, whose death he promises to avenge.

Felicity Will Be 'Conflicted' About Her Father's Return, Showrunner Dishes

Here's the official synopsis:

"VIXEN JOINS TEAM ARROW - Oliver (Stephen Amell) realizes he needs help battling Darhk (guest star Neal McDonough) so he calls in an old friend - Vixen (guest star Megalyn E.K.). Using her magical ability to summon animal powers, Vixen gets a lock on Darhk's location and the team goes to war. Meanwhile, Thea (Willa Holland) has a heart-to-heart talk with Malcolm (John Barrowman)."

'Taken' will air on February 24 on The CW.

Watch the preview:

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Arrow, The cw, Television