The documentary left viewers claiming it was an accident waiting to happen as they flocked to social media to share their thoughts. One wrote: "Personally I think Titanic should be left alone as a memorial to those who died and certainly not visited by a carbon-fibre sub which had cracked on a previous deep dive.

The documentary will uncover the true story of what happened when the 2023 OceanGate submersible imploded, killing all on board.

Adventurer and businessman Alfred Hagen, who had paid $200,000 in 2021 to try to reach the Titanic wreck on board Titan, was part of Dive 61, which was abandoned at 7m. After it was back above the surface, the submersible's titanium dome fell off.