"Black Sunday" is a 1970 thriller film directed by John Frankenheimer and based on the novel by Thomas Harris. The story revolves around a terrorist plot to attack the Super Bowl using a blimp filled with explosives. The film explores themes of fear, security, and the impact of terrorism on society. The main characters include Marty Rittner, a former Vietnam War veteran, and Diana, a skilled assassin. As the plot unfolds, law enforcement agencies race against time to prevent the catastrophic event. The film is notable for its intense action sequences and commentary on the vulnerabilities of public events.