Next Up The Blacklist Season 7 Episode 17 'Brothers' Sneak Peek

Team Arrow is on a rescue mission.

In this exclusive sneak peek at tonight's Arrow, Oliver (Stephen Amell) and Dig (David Ramsey) infiltrate Damien Darhk's (Neal McDonough) underground city — with some much-needed help from Felicity (Emily Bett Rickards), natch.

And since Oliver is only there to save Thea (Willa Holland), Ruve Darhk (Janet Kidder) says it's Malcolm (John Barrowman) responsibility to stop Team Arrow from destroying Genesis before it even begins.

See what goes down in the video above!

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