The documentary titled "Implosion: The Titanic Sub Disaster" offers unprecedented insight into the events leading up to the Titan submersible's catastrophic end. Recorded 22 hours ago, it features footage from the support ship, where Wendy Rush asks, "What was that bang?" moments before the sub imploded during its descent to the Titanic wreck, resulting in the immediate deaths of all five passengers, including Stockton Rush himself. The footage is crucial evidence for the US Coast Guard's ongoing investigation, which has uncovered alarming details about the sub's design and prior warnings from deep-sea experts regarding its safety.

The investigation has revealed that carbon fibre used in the Titan's construction began to degrade over a year before the incident, suggesting that the sub was already at risk. Warning signs were evident during previous dives, with experts likening the experience to "playing Russian roulette." The documentary captures the emotional impact of the disaster on the victims' families, who continue grappling with their losses. Oceangate has since closed its operations and has cooperated fully with the inquiry, as the search for accountability and prevention of future tragedies continues.

You can watch "Implosion: The Titanic Sub Disaster" on BBC Two on 27 May at 9 PM, available afterward on BBC iPlayer.