In 1959, nine hikers died under inexplicable circumstances in the Ural Mountains of the Soviet Union. Their tent was found cut open from the inside. Some had fled into extreme cold without adequate clothing. Others displayed injuries that were difficult to explain. The official investigation closed the case without a conclusive answer. Decades later, it remains one of the most analyzed mysteries of the twentieth century.

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On January 19, 2013, Elisa Lam entered the elevator of the Cecil Hotel in Los Angeles. She was never seen alive again. Weeks later, police released the security camera footage. The world watched. The world had no explanation. Case Zero reconstructs, episode by episode, the real cases that remain unanswered.

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In November 1970, the body of a woman was found in Isdalen Valley, in Norway. She was partially burned, and no documents were found to identify her. Her belongings shared a peculiar trait: labels had been removed, objects had been altered, and traces had been erased. The investigation revealed that she had traveled across Europe using multiple identities and routes that were deliberately difficult to trace. Despite the efforts of authorities, her name was never confirmed. In this episode, Case Zero reconstructs the known facts and the lines of investigation surrounding one of Europe's most persistent mysteries — a story that, more than fifty years later, remains unsolved.

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