A new quick turnaround documentary on U.K. broadcaster Channel 5 will center on the heartbreaking search to find and rescue the Titan submersible before it exhausts its four-day air supply.

The television program “Titanic Sub: Lost at Sea” is slated to show on Thursday at 7 p.m. local time. Dan Walker, the host of 5 News, will introduce the documentary.

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In addition to updating viewers on current events, the ITN-produced documentary promises to “go beyond” news coverage and look at the larger background surrounding the journey, its passengers, and the fascination with the Titanic shipwreck. The documentary will also feature expert interviews and a look at the rise of extreme travel.

In the UK, ITN is a go-to production business for quick-turnaround films that address current events. The group just released a special on British woman Nicola Bulley, who went missing in January while out on a dog walk and was discovered dead three weeks later in a nearby river.

Ian Rumsey, managing director of content for ITN, said: “This program will chart everything from the exploration itself, to the rise of extreme tourism, to the rescue attempts, but above all it will tell a very human story that has captured the nation which is about 5 people, all with families, who are trapped at the bottom of the ocean. Our expertise and heritage in fast-turnaround documentaries and reputation for responsible filmmaking means we always treat such stories with great sensitivity.”

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Five crew members were aboard the Titan, which is about the size of a truck and disappeared in the Atlantic Ocean on Sunday. A comprehensive rescue operation is being supported by government organizations and deep-sea specialists. In what has now been a three-day search and rescue effort for the submersible, which lost touch on Sunday around an hour and 45 minutes into its dive to visit the Titanic wreck, banging sounds were heard in a search area on Tuesday, signifying the first breakthrough.

Five people have been verified to be on board: OceanGate CEO Stockton Rush, British businessman Hamish Harding, British-Pakistani businessman Shahzada Dawood and his son Suleman, 19; ex-French Navy diver Paul-Henry Nargeolet; and businessman Shahzada Dawood.