Wife of OceanGate's CEO asks eerie question following the Titan submersible's tragic implosion

Chilling footage has been released showing the wife of OceanGate CEO Stockton Rush unknowingly hearing the eerie moment her husband died.

A BBC documentary crew have been awarded unprecedented access to the US Coast Guard's investigation into the Titan submersible that imploded back in June 2023.

All five people on board were tragically killed while on a once-in-a-lifetime expedition to view the Titanic, after the vessel collapsed in on itself due to the immense pressure of the water.

Alongside Rush, there were four other passengers onboard the submersible - the youngest of which was 19-year-old Suleman Dawood, and he was joined by his dad Shahzada, a 48-year-old British-Pakistani businessman.

British businessman Hamish Harding, aged 58, and 77-year-old former French navy diver Paul-Henri Nargeolet, completed the lineup.

Now, in never-before-seen footage obtained by the documentary crew for Implosion: The Titanic Sub Disaster - which airs on the Discovery Channel in the US on Wednesday (May 28) - Wendy Rush can be seen monitoring the vessel's descent when she hears an external noise.

While Wendy waited for confirmation from the team to explain that they had reached the sea bed, an external noise - described by one US Coast Guard official as a 'door slamming'.

Wendy can be heard asking her fellow members of the communications and tracking team: "What was that bang?"

Tragically, that was the sound of her husband's vessel imploding with him inside it, but moments later she received a message from the sub - giving her the assumption that everything was OK.

In the documentary, a narrator explains: "She mistakenly seems to think everything is OK, but in fact it's taken longer for the message to arrive than the sound of the implosion. Everyone onboard is dead."

Wendy Rush asks her colleagues 'what was that bang', unbeknown to her that it was the moment her husband had died (BBC)

The submersible's implosion took place roughly an hour and 45 minutes into a two-and-a-half-hour descent.

However, at the time it was not known that the doomed vessel had been destroyed, and instead a frantic search was launched to help find those onboard - who were just deemed missing, while in reality they were instantly killed in the implosion.

It was thought that the five explorers had just 96 hours of oxygen.

On June 19 2023, the US Coast Guard launched a large-scale search and rescue operation when the vessel failed to resurface or make contact almost 24 hours on.

Two days on from the Titan's disappearance on June 21, sonar crews taking part in the search pick up 'banging noises', giving false hope that the passengers are still alive.

At 1pm E.T. on June 22, the submersible's 96-hour oxygen supply was predicted to have run out, cementing fears for the crew onboard.

Four days on from its disappearance, the wreckage of the Titan sub was discovered on the ocean floor.