Dominic West narrates this extraordinary story of the two RAF squadrons who sank Germany’s most dangerous battleship and offers intriguing new evidence to explain the raid’s improbable success.

Tirpitz was Nazi Germany's most powerful and dangerous battleship. Winston Churchill christened it "The Beast".

Protected by an elite squadron of German fighters, it appeared invincible.

After 34 attempts to sink it in its Norwegian lair had failed, the RAF sent in the 617 'Dambusters' Squadron and 9 Squadron, and in a spectacular raid on 14 November 1944 they managed to slip through German defences and sink "The Beast".

With eyewitness accounts from surviving RAF crew, one of the Luftwaffe fighter pilots and German sailors who were on Tirpitz that day, this documentary tells this extraordinary story from a uniquely intimate and personal perspective.