Set after the massacre of 11 Israeli athletes at the 1972 Munich Olympics, Steven Spielberg's latest film Munich follows a secret Israeli squad assigned to track down and kill the 11 Palestinians suspected of having planned the attack.

At the beginning of the film, Spielberg and the screenwriter Tony Kushner state that it was only 'inspired' be true events, and they have admitted that much of the detail is fictional. Channel 4's documentary Munich: Mossad's revenge investigates what really happened after the years after the 1972 Olympics.

It will be accompanied by a website: Tit for Tat: Acts of vengeance and their consequences. As well as covering the revenge carried out by the Israeli covert intelligence agency Mossad for the Olympics massacre, this will examine a number of other acts of violence that led to further bloodshed, including Ghenghis Khan's invasion of Turkey in 1220, the 1942 assassination of Nazi boss Reinhard Heydrich and the murder of Indira Gandhi in 1984.