A serial killer named The Shark is terrorizing London by killing his victims with a speargun and then, dressed in a scruba-diver's wetsuit, using the city's sewer tunnels to make his getaway.

• Rialto Film
• Joachim Fuchsberger
• Brigitte Grothum
• Elisabeth Flickenschildt
• Klaus Kinski
• Eddi Arent
• Richard Münch
• Jan Hendriks
• Heinz Engelmann