Agent 3S3: Massacre in the Sun

Agent 3S3: Massacre in the Sun (originally Agente 3S3, massacro al sole) is a 1966 eurospy adventure film directed by Sergio Sollima, here credited as Simon Sterling. A sequel to the 1965 Agent 3S3: Passport to Hell, it features George Ardisson once again in the role of Agent 3S3. An Italian production co-produced with France and Spain, it was shot back to back with its predecessor, with filming taking place in Berlin and Ibiza.

The score was composed by Piero Umiliani, while popular Italian singer Orietta Berti performed the film's English-language theme song "Trouble Galore." The cast also includes Michel Lemoine, Frank Wolff, Evi Marandi, Fernando Sancho and Eduardo Fajardo. The film was released in France as Agent 3S3, massacre au soleil and in Spain as 3S3, agente especial.