Desc: Geisterjäger John Sinclair: Die Dämonenhochzeit: Directed by Klaus Knoesel. With Florian Fitz, Jophi Ries, Peter Fitz, Tabea Tiesler. Three girls summon a demon. John Sinclair, a British investigator for supernatural phenomena, travels to Germany to meet Kerstin who is the only girl left. But the demon wants to sacrifice her in the old cathedral of Cologne.