JJ Chalmers heads to HMS Raleigh in Cornwall, the home of Royal Navy training, to see how recruits are prepared for the harsh realities of war. Kate Humble is aboard a warship as a brand-new helicopter pilot takes an important step in their career - landing on the deck of a moving warship at sea for the very first time. Also, JJ explores the legacy of HMS Ark Royal, one of the Navy's most iconic aircraft carriers.