Z is a 1969 Algerian-French political thriller film directed by Costa-Gavras, with a screenplay by Gavras and Jorge Semprún, based on the 1966 novel of the same name by Vassilis Vassilikos. The film presents a thinly fictionalized account of the events surrounding the assassination of democratic Greek politician Grigoris Lambrakis in 1963. With its satirical view of Greek politics, its dark sense of humor, and its downbeat ending, the film captures the outrage about the military dictatorship that ruled Greece at the time of its making.