WATCH: Time Runs Out for Team Arrow in New Promo for "11:59"

Tonight's episode of "Arrow" -- "Beacon of Hope" -- potentially saw the end of Oliver and Felicity's relationship for good. It also saw the alignment between Malcolm Merlyn and Damien Darhk, who sent Malcolm on a mission to find Diggle's brother, Andy. With Malcolm and Damien working together, that can only spell trouble for Team Arrow, especially since they both blame Oliver for ruining their lives.

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The trailer for next week's episode -- "11:59" -- shows Malcolm invading Team Arrow's cave and fighting head-to-head with Thea. Andy and Oliver are also fighting in the trailer, with John Diggle aiming a gun at Oliver. Someone dies next week, will it be Andy? Oliver? John? Thea? "11:59" looks to be a game changing episode that will ultimately set the course for the final six episodes of "Arrow's" fourth season.

MALCOLM MAKES HIS MOVE - Oliver (Stephen Amell) and Diggle (David Ramsey) learn that Merlyn (John Barrowman) is going to try to break Darhk (guest star Neal McDonough) out of prison. Meanwhile, Laurel (Katie Cassidy) gets a surprising offer and Felicity (Emily Bett Rickards) has a heart-to-heart talk with Curtis (guest star Echo Kellum). Rob Hardy directed the episode written by Marc Guggenheim & Keto Shimizu (#AR418). Original airdate 4/6/2016.

"Arrow" airs Wednesdays on The CW at 8 p.m.

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