Mammootty was supposed to begin the shooting of Big B sequel Bilal in March, but we know how the pandemic had altered the shoots of planned projects. It is now reported that Mammootty will start shooting for SN Swamy-K Madhu's CBI film. Mammootty plays a brilliant CBI officer Sethurama Iyer in the famous CBI franchise and once lockdown is lifted, Mammootty will join the tentatively titled CBI 5. As for the iconic Sethurama Iyer background theme music, it will be improvised. Young composer Jakes Bejoy will handle the music department. The team is pinning hopes on the government who is expected to ease the restrictions as CBI 5 shoot would involve extensive outdoor shoot requiring atleast 200 personnel.