The preview for the upcoming episode of season 4 of Arrow reveals that Oliver (Stephen Amell), Felicity (Emily Bett Rickards) and crew will begin their mission to take Damien Darhk (Neal McDonough) down in the upcoming episode of the CW series.

In the clip, Felicity raises alarm about Andy Diggle, younger brother of John Diggle (David Ramsey) who was assumed dead at the hands of H.I.V.E, being manipulated by Darhk. Oliver and crew are seen gearing up to take Darhk down and get Andy out of his devilish clutch.

"We are going to take this guy down," Oliver says determinedly.

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In other news, it has also been revealed that Darhk will not be happy about Oliver's mayoral candidacy. In a recent interview with TVLine, showrunner Wendy Mericle and McDonough dished about what fans can expect from the two antagonists. Mericle revealed that Oliver's candidacy "will not sit well" with Darhk and he will be spurred to do something about it. Darhk has always had a bit of an issue with the person who takes the position and not necessarily Oliver.

Here's the synopsis for the episode titled 'Brotherhood':

"Team Green Arrow's ongoing battle with Damien Darhk (Neal McDonough) is complicated by a shocking revelation. Thea's (Willa Holland) bloodlust returns and she loses control in front of Alex (guest star Parker Young)."

The episode will air on Nov. 18.

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Arrow, The cw, Television