Nerariyan CBI (നേരറിയാൻ സി.ബി.ഐ.)
Nerariyan CBI (നേരറിയാൻ സി.ബി.ഐ.; transl. CBI to know the truth) is a 2005 Indian Malayalam-language mystery thriller film directed and produced by K. Madhu and written by S. N. Swamy, starring Mammootty as the Central Bureau of Investigation officer Sethurama Iyer.1 • 2 It is the fourth film in the CBI series, following Oru CBI Diary Kurippu (1988), Jagratha (1989), and Sethurama Iyer CBI (2004), and preceding CBI 5: The Brain (2022).3
| Key fact | Detail |
|---|---|
| Release | 2005; listed as 9 September 2005 by FilmiBeat and Socinety, 8 September by Digit, and 20 September by Nowrunning4 • 5 • 6 |
| Series position | Fourth of five CBI films, all directed by K. Madhu and scripted by S. N. Swamy3 |
| Lead cast | Mammootty as Sethurama Iyer, Mukesh as Chacko, Jagathy Sreekumar as Vikram, Thilakan as Kapra1 |
| Runtime and rating | About 2 hours 27 minutes; certified U in India7 |
| Plot | Mysterious deaths in an aristocratic mansion, investigated by Sethurama Iyer after supernatural explanations are blamed7 |
| Reception | A strong theatrical response despite not matching the first film's quality, per Onmanorama; IMDb rating 6.1 from about 1,000 votes8 • 7 |
Spoilers
Plot
The story is set at the Animangalam Tharavad, an aristocratic old mansion where strange events and several murders occur when Anitha (Gopika), a member of the family, arrives with two friends for a holiday. The same night, Mythili (Samvrutha Sunil) dies mysteriously, and the police close the case as an accident.9
Four years later, Sai (Jishnu), an IPS officer and Anitha's lover, meets Sethurama Iyer at an airport and briefs him on the unusual case, in which supernatural forces are blamed for the death. Iyer takes the investigation as a challenge and, with his usual team of Chacko (Mukesh) and Vikram (Jagathy Sreekumar), works to expose the true killer.9 A contemporary review describes the setup as a cursed tharavad, fearsome spirits, and mysterious deaths confronting the sleuth, with the occupants of the mansion belonging to a joint family whose members each have ulterior motives.11
Production and place in the series
All five films of the CBI franchise were helmed by K. Madhu and scripted by S. N. Swamy, making it a long-running collaboration between a single director-writer-actor team.3 The series began when Swamy, originally planning a cop thriller, was persuaded by Mammootty to write about a CBI officer instead, because the actor had recently starred in the police film Aavanazhi (1986).3 The resulting character, Sethurama Iyer, became one of Malayalam cinema's most recognizable detectives, and Nerariyan CBI brought the team together for a fourth installment.6
The film carries the tagline "An Unnatural Story Told In A Natural Way" and was produced under the banner Kyoshi Movies, with Saloo George as director of photography and P. C. Mohanan as editor.9 • 10 Sources disagree on the composer: Apple TV credits the musical score to Rajamani, while FilmiBeat and Socinety list Shyam Sunder.1 • 4 • 10
Cast
The cast is led by Mammootty, Mukesh, and Jagathy Sreekumar, with Thilakan playing Kapra, a faith healer with expertise in spirits and disturbed souls.1 • 11 Other roles include Gopika as Anitha, Samvrutha Sunil as Mythili, Jishnu Raghavan as Sai, Suja Karthika as Lakshmi, Suvarna Mathew as Maya, Rizabawa as Dr. Babu, Indrans as Devaswam, Madhu Warrier as Pradeep, Mohan Jose as Velu, V. K. Sreeraman as Sankaran, Cochin Haneefa as George C Nair, Augustine as DYSP Dhanapalan, and Bindu Panicker as Elizabeth C Nair.7
Reception
Box office and critical response. Onmanorama's retrospective on Malayalam franchises wrote that Nerariyan CBI received a great theatrical response despite not matching the original film's quality.8 Moviebuff states the film was a box office hit grossing over 130 million (13 crore) INR across its Tamil and Malayalam versions.9 The Nowrunning reviewer K. T. Thomas judged that the film depended heavily on the appeal of Sethurama Iyer to compensate for a storyline he found unconvincing, and that Mammootty's performance made the film watchable; he singled out Thilakan's impact in a small role and Iyer's confrontation with the faith healer as the film's strongest stretch.11 On IMDb the film holds a 6.1 rating from about 1,000 votes.7
The film is also noted in studies of Indian film advertising: in one scene, Mammootty's character recommends the jeweler Kalyan to another character, an example cited in academic and industry discussions of brand placement in Malayalam cinema.12
Legacy
Nerariyan CBI was the last CBI film for 17 years until CBI 5: The Brain opened on 1 May 2022, again with Mammootty as Sethurama Iyer.3 The film remains available on streaming services, including Eros Now via the Apple TV channel, and on Hotstar and Prime Video according to aggregator listings.7 • 5
References
- Nerariyan CBI, Apple TV
- Nerariyan CBI climax scene video description, YouTube
- The legacy of Sethurama Iyer and where the CBI franchise should have ended, The Indian Express
- Nerariyan CBI Cast & Crew, FilmiBeat
- Nerariyan CBI Movie (2005), Digit Binge
- Nerariyan CBI (2005) | Nerariyan CBI Malayalam Movie | Movie Reviews, Showtimes | nowrunning
- Nerariyan CBI streaming, JustWatch
- What makes a sequel click? Lessons from Malayalam's most iconic franchises, Onmanorama
- Nerariyan CBI (2005), Moviebuff
- Nerariyan CBI (2005), Socinety
- Nerariyan CBI review by K. T. Thomas, Nowrunning
- Branding in Movies and its Influence on Buying Behaviour, IJITEE
Topic: Encyclopedia › Arts and culture › Screen and stage › Film and television › Films and standalone screen works › Individual films by title and year › Indian films (individual works) › Malayalam films before 2010
Initially written Oct 3, 2026 · Reviewed: Oct 3, 2026; Oct 25, 2026 · Edited: Oct 3, 2026; Oct 25, 2026; Nov 1, 2026 · Last review: Oct 25, 2026
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