Eric Thompson has had his finger literally on the nuclear button. He joined the Royal Navy submarine service in the early days of the Cold War. He served on WW2 era ships and submarine before ending his career as a senior officer on Britain's state of the art nuclear submarines. Each one armed with inter continental ballistic missiles with nuclear tips. He took Dan to the Royal Navy Submarine Museum in Gosport to show him around one of the finest preserved submarines in the world, HMS Alliance. He told Dan how they kept the beer cold and why his main concern at sea was the toilet.