VIDEO: Watch Trailer for ARROW's'Irreconcilable Differences' Midseason Finale '

On the Midseason Finale of ARROW titled "Irreconcilable Differences," Quentin Lance (Paul Blackthorne) is kidnaped by Black Siren (Katie Cassidy) and Cayden James (guest star Michael Emerson), who are looking to trade Lance's life for a weapon of mass destruction. Oliver (Stephen Amell) and Team Green ARROW must figure out a way to save Lance while still keeping the city safe.

Laura Belsey directed the episode, which was written by Beth Schwartz & Sarah Tarkoff. The episode airs Thursday, December 7th at 9/8c on The CW. Get a sneak peek below!

After a violent shipwreck, billionaire playboy Oliver Queen (Stephen Amell) was missing and presumed dead for five years before being discovered alive on a remote island in the Pacific. He returned home to Starling City, bent on righting the wrongs of his family and fighting injustice. To do this, he creates the persona of ARROW - a vigilante - and allies himself with former military man John Diggle (David Ramsey) and computer Science expert Felicity Smoak (Emily Bett Rickards), while keeping his secret from those closest to him. After three years of denying himself his own life as Oliver Queen in order to be The Arrow, season four opens with Oliver and Felicity enjoying their new life together in suburbia, where she is running Ray's company remotely, after his mysterious death. But their newly tranquil lives are upended when Laurel and Thea arrive to recruit Oliver to save Starling City, now renamed Star City, from an evil new organization, H.I.V.E. Oliver must return to Star City and don the hood once more. But can he keep his aim as The ARROW this time without losing the life he has fought so hard to get back?

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