India, Oct. 5 -- The Conclusion had one particularly difficult job: surprise an audience that has spent years trying to stay ahead of Ajay Devgn's Vijay Salgaonkar. Every clue, every suspicious detail and every possible loophole is bound to be examined more closely when it comes to the Drishyam franchise. For writer Aamil Keeyan Khan, that meant the third film could not simply repeat what had worked before. It had to find a new way to keep viewers guessing.

As Drishyam 3 continues its strong run in theatres, Aamil has opened up about what went into creating the final chapter. He also recalled working with Ajay Devgn and why the actor's ability to switch between conversations and characters left him stunned.

One of the biggest questions ...