Sethurama Iyer CBI is a 2004 Indian Malayalam-language mystery crime film directed by K. Madhu and written by S. N. Swamy. It stars Mammootty in the title role, alongside Mukesh and Jagathy Sreekumar in supporting roles. Shyam composed the background score for the film. The film is the third installment in the CBI film series, featuring Mammootty as CBI officer Sethurama Iyer. imdb.com