Cautionary Tales – The Drop of Paint that Sank a Submarine (opens in new tab)

Brand new submarine HMS Thetis is the pride of the British Navy. In 1939, she sets out for a test dive with 103 men on board. But a tiny flaw in her construction has gone unnoticed, and the crew of Thetis is soon racing against time to stop that flaw from spiralling into total destruction. […]