The actor travels dives even deeper on shipwrecks of major historical importance, exploring the remnants of some of the most significant moments in British history. He dives on shipwrecks around the British coastline to reveal some of the nation's murkiest and best-kept secrets, beginning with the site of Britain's most famous wreck - the Mary Rose. Ross is accompanied by dive master Neil Brock and tank expert and safety diver Mark Culwick.