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In the season premiere, the investigative trio climb aboard the legendary ocean liner Queen Mary, now permanently docked in Long Beach, California, and considered to be one of the most haunted places in the world. Not long after the ship's maiden voyage in 1936, it was put into military service. Tragedy surrounded the ship - nicknamed the "Gray Ghost" - until 1967 when it dropped anchor for good and became a hotel, still in operation today. With reports of multiple apparitions and voices - including that of a former crewman and little girl - the trio prepares for a powerful investigation.