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The team investigate paranormal activity in Germany's Rhineland. At the Rheinfels Castle, which has a notorious underground prison and tunnel system, they witness a mysterious flash of light and hear strange voices. After becoming lost in the labyrinth of tunnels, Kay hears his name called out, by whom he doesn't know. Next they explore a 11th Century castle known as Burg Reichenstein where Ian makes psychic contact with what he believes is the ghost of a headless man - and the team are under threat.
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