Agent 3S3: Massacre in the Sun is a 1966 Italian adventure-eurospy film directed by Sergio Sollima, here credited as Simon Sterling. This is a sequel to Agent 3S3: Passport to Hell (1965) with Agent 3S3 once again played by George Ardisson. Orietta Berti, a popular Italian singer, sings in English the film's theme "Trouble galore". The two films were shot back to back.