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Arrow: Oliver and Green Arrow Join a Russian Fight Club in New Promo

Timelines converge as Arrow moves closer to its series finale, and a promo for an upcoming episode shows the Queen family together, with a reunion as only they could have it: in a brutal cage match.

The CW has released a sneak peek at the final season's fifth episode, titled "Prochnost" -- the Russian word for "endurance" -- which sees Oliver and his time-displaced daughter Mia Smoak enter an underground Russian fighting ring, sponsored by Oliver's son William Clayton.

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While Oliver and his daughter prove themselves more than a match for their hulking opponents, things take a turn for the worse as one of the bosses overseeing the fight pulls a gun in the clip.

The network released official stills from the episode last week teasing the cage match while revealing John Diggle recruiting Roy Harper to reclaim his superhero mantle as Arsenal.

RELATED: Arrow: Oliver is Double-Crossed by an Ally in Pre-Crisis Synopsis

Airing Tuesdays at 9 p.m. ET/PT on The CW, Arrow's final season stars Stephen Amell as Oliver Queen, David Ramsey as John Diggle, Rick Gonzalez as Wild Dog, Juliana Harkavy as Black Canary, Katie Cassidy as Black Siren, Katherine McNamara as Mia Smoak, Joseph David-Jones as Connor Hawke and Ben Lewis as William Clayton-Queen.

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