Mammootty has joined hands with senior filmmaker K Madhu once again, for the much-awaited 5th installment of the CBI Series. The project, which has been tentatively titled CBI 5 will have Mammootty once again playing the iconic character Sethurama Iyer. The much-awaited title announcement motion poster of CBI 5 has now got a release date. The movie title is `CBI 5 The Brain`. The title video was released. The poster features the series` iconic background score with Sethurama lyer`s iconic posture hands tied behind the back. The title of the film is shown on the motion poster with the caption "Most Violent Investigator in the World, Sethurama Iyer, Rebooted”. The fifth part of the film comes long after the release of `Nerariyan CBI` in 2005. The first film in the series `Oru CBI Diarykkurip` was released in 1988. Its sequel Jagratha` was released the next year and in 2004 Sethurama lyer CBI. `CBI-5 The Brain` will be directed by K Madhu, who has directed other films. As in the previous films, the script is by SN Swamy himself. The movie is produced by Appachan under the banner of Swargachithra. The fifth film`s music is composed by Jakes Bijoy. The film also stars Ranji Panicker, Saikumar, Soubin Shahir, Mukesh, Anoop Menon, Dileesh Pothen, Prathap Pothen, Ramesh Pisharody, Kaniha, and Asha Sarath.