International terrorists attempt to kidnap a wealthy couple's child. Their plan comes unstuck when a deadly Black Mamba, sent by mistake instead of a harmless snake, escapes and the terrorists and several hostages are trapped in the boy's London home.

• Morison Film Group
• Venom Productions Limited
• Klaus Kinski
• Oliver Reed
• Nicol Williamson
• Sarah Miles
• Sterling Hayden
• Cornelia Sharpe
• Lance Holcomb
• Susan George