Titanic: Into the Heart of the Wreck
7.30pm Channel 4
The most scrutinised shipwreck in the world continues to fascinate people all these years later, and this one-off special looks back at the expeditions that have captured the haunting beauty of the Titanic.
We learn about the evolving technology over the years, from the French-american team who discovered it in 1985, to missions led by veteran Hollywood director James Cameron.