India's 30-year submarine plan promised a world-class fleet. A mix of conventional diesel-powered submarines and both nuclear-powered attack and ballistic submarines. But decades later, delays, policy paralysis, and shifting priorities have left the Indian Navy with far fewer submarines than it planned for. In this episode, Dev Goswami and Sandeep Unnithan dive deep into the Navy's Project 75, 75I, and beyond -- exploring what went wrong, where things stand, and why building a submarine is far harder than it seems.

From nuclear-powered ambitions to the delays in conventional fleets, this is the full story of India's undersea puzzle.

Produced by Garvit Srivastava

Sound mixed by Rohan Bharti