In New York City, potent strands of bath salts have surfaced and have attracted the most devoted bath salt junkies. A young aspiring chemist has developed an even stronger batch... but something has gone horribly wrong.

　　英格兰的巨石阵是著名的史前遗址，如今的新兴技术正在逐步揭开巨石阵深藏其中的奥秘，巨石阵的起源说将令世人震惊。本集中，我们要将石头连根拔起，埋葬的骨骼、隐秘的雕刻品、还有天象的奥秘，都埋藏在这个石器时代杰作的核心之处。——纪录片之家字幕组