A German officer watching the city burn recorded that the street dogs threw themselves into the freezing Volga to escape: "Animals flee this hell... only men endure." The Battle of Stalingrad was the largest and deadliest urban battle in human history, a meat grinder that consumed up to 1.5 million Axis and over 1.1 million Soviet casualties, reduced 99 percent of a city of half a million to dust, and permanently broke the myth of German invincibility.

This episode traces how a secondary flank objective in Hitler's oil-driven Case Blue offensive metastasized into an ideological duel between two dictators over a city's name. It follows the apocalyptic Luftwaffe bombing that ironically buried German tank advantages under three stories of rubble, the women of the 1077th Anti-Aircraft Regiment who lowered their guns at advancing Panzers, Chuikov's "hugging the enemy" tactic, the Rattenkrieg fought through floorboards and sewers, and the encirclement that ended with a field marshal choosing surrender over suicide.

• How a strategic flank became a political obsession: Case Blue, the Caucasus oil, and a city named Stalin
• Hugging the enemy: Chuikov's 50-yard rule that neutralized the Luftwaffe and killed the Blitzkrieg
• The grain elevator and Pavlov's House: micro-fortresses that held against impossible odds
• Operation Uranus and the failed airlift: 300,000 men encircled, promised supplies that never came
• The loaded pistol of a field marshal's promotion, 90,000 prisoners, and the 5,000 who came home in 1955