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.
Venom is a 1981 British natural horror-thriller film directed by Piers Haggard and written by Robert Carrington. It stars Sterling Hayden, Klaus Kinski, Sarah Miles, Nicol Williamson, Cornelia Sharpe, Susan George, Lance Holcomb, and Oliver Reed. The film is based on Alan Scholefield's novel of the same name.