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Investigative journalist and Titanic expert Senan Molony examines recently recovered photographs of the doomed ship, which provide fresh insight into the reasons for its sinking.
The images reveal a strange mark on the hull, which may prove previously overlooked stories of a fire raging in the boiler room.
This blaze may explain why the captain chose to ignore warnings of icebergs ahead and why the vessel sank so quickly after the fatal collision.
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Previous broadcasts on TV
Broadcasts in 2018
13/03/2018 at 22:00
Broadcasts in 2017
17/10/2017 at 22:00
19/06/2017 at 21:00
On Channel 4
01/01/2017 at 20:00