国际恐怖分子企图绑架一对富裕夫妇的孩子。他们的计划失败了，因为一条致命的黑曼巴蛇被误认为是一条无害的蛇，逃走了，恐怖分子和几名人质被困在男孩位于伦敦的家中。
Klaus Kinski
Jacques Müller (Jacmel)
Oliver Reed
Dave Averconnelly
Nicol Williamson
Cmdr. William Bulloch
Sarah Miles
Dr. Marion Stowe
Sterling Hayden
Howard Anderson
Cornelia Sharpe
Ruth Hopkins
Lance Holcomb
Philip Hopkins
Susan George
Louise Andrews
Michael Gough
David Ball
Mike Gwilym
Det. Constable Dan Spencer
Edward Hardwicke
Lord Dunning
John Forbes-Robertson
Sgt. Nash
Hugh Lloyd
Cab Driver
Rita Webb
Mrs. Loewenthal
