Episode 3

HMS Ocean is buzzed by more than a dozen Iranian gunboats on her way to the Gulf. When she arrives, in a first for a British warship, she takes over from a US aircraft carrier to lead the American naval task force in the area, under the control of senior British officer Commodore Andrew Burns. Meanwhile, stoker Michael Hedgecock - the fifth generation in his family to have served in the Navy - is up on a serious charge, and Ocean's second in command Nick Wood will be his judge and jury. And as Christmas approaches, Prime Minister Theresa May visits HMS Ocean to address the ship's crew and the world's media. It's a big moment for some of the young recruits on board.