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Kayıp The Astraeus crew returns to Eureka four years later and must adapt to a myriad of changes, including a more oppressive version of Deputy Andy.
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Gerçek Olan The town huddles in a last attempt to locate the vanished Astraeus before it's too late!
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Çıkışa Zorla Beverly Barlowe resurfaces in Eureka seeking Carter's help to free the Astraeus crew, and the rescue plan lands Carter in the crew's virtual world.
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Dost Ateşi When a smart fire experiment gets out of control, Carter and team discover that the Astraeus victims may be the cause.
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Ne İş Olsa Yaparım The crew moves forward after an ordeal and Warren's visit adds to the pressure.
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Felaket Senaryosu Henry conducts a preparedness drill that winds up a disaster and Fargo faces a hard reality.
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Allah Büyüktür Fargo is convinced that Holly is still inside of the Matrix computer, but the DOD is determined to wipe its hard drive clean -- losing Dr. Marten forever.
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Çok Derinlerde Carter's romantic surprise for Allison turns deadly when they're trapped in a sinking marine lab with time and oxygen quickly running out.
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Daha Zeki Carter When Allison's genius older brother comes to meet her new husband, Carter feels the pressure of not being smart enough to measure up.
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Balayı Çifti Jack and Allison's perfect honeymoon is interrupted when sabotage is discovered in Eureka. Elsewhere, Holly faces another hurdle to remain intact.
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Ayna, Ayna Eureka is cut off from the world by a malfunctioning experiment that threatens to eradicate the town's populace.
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Geç İdrak The people of Eureka are being kidnapped and replaced by body-doubles one by one unless Allison, Fargo and Zane can figure out how to avoid capture and save their town.
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Sıradan Bir Gün Wormholes randomly materialize around Eureka as the Department of Defense is set to shut the town.