The fourth part of the gripping investigative film series in which Mamooty plays a CBI officer is titled Neru ariyan CBI. The final stages of the dubbing schedule are on in Chennai. Then the DTS mixing will commence from 24th of this month. The post-production for the previous films was done in Chennai and all of them were super hits. Continuing the sentiment, the producers have scheduled similarly for this film as well. Meanwhile, Sandhupottu in which Dileep plays a transvestite is nearing completion.