The episode introduces (played by Kay Kay Menon), a veteran R&AW officer who has spent 19 years tracking a mysterious "sixth" terrorist he believes masterminded the 2001 Indian Parliament attack. The narrative is framed through an official audit of Singh's "miscellaneous" expenses, conducted by two skeptical officials, Naresh Chaddha and D.K. Banerjee. As Singh justifies his spending, he reveals a complex network of deep-cover assets stationed across the globe. Key Characters & Cast