Secrets of the Lost Liners säsong 2

The RMS Titanic sank with a terrible death toll in 1912, but the First World War soon overshadowed the tragedy. Decades later, two men strived to rediscover the ship's memory.

In January 2012, on the first leg of a cruise around the Mediterranean Sea, the Costa Concordia deviated from her route and was rocked by a deadly crash that left 32 passengers and crew dead.

A ship with incredible misfortune, the MS Achille Lauro suffered two serious collisions, multiple onboard fires, and even witnessed the murder of a passenger after being hijacked by PLO terrorists in 1985.

After losing power in a storm off South Africa in 1991, Oceanos was abandoned by many of her crew, including the negligent captain, leaving hundreds of passengers stranded on board.

A lavish cruise ship for the super-wealthy, the Empress of Britain was called up for war duty and entered an epic final battle with the German Luftwaffe before being torpedoed by a U-boat.

The pride of France after saving many lives and surviving the Second World War, the groundbreaking luxury liner Île de France was ultimately used and flooded for a 1959 disaster film just before the ship was due to be scrapped.