661. Aakhri Chunauti - Part 6

Daya escapes a bomb blast in a tunnel. CID is called to investigate the mysterious death of a woman. What looked like a case of accidental poisoning takes a surprising twist as CID finds that the victim in question was living under two separate identities, Naina and Devika. The cops try to solve the case while also looking for the mastermind criminal HD who has proved to be notoriously well informed about CID's every move. Will they catch him?