"Titanic: The Final Word With James Cameron" premieres on Sunday 8 April at 8pm and is an in-depth two-hour special, featuring some of the world's foremost Titanic experts who solve some of the enduring mysteries behind her downfall. Here's a clip.

Fascinated by the Titanic, Dennis was enthralled by Hampton Side, a journalist whose cover story in this month's "National Geographic" takes a look at the ship and catastrophe 100 years later and offers new insights.