That very footage, combined with this photo of Tom Cruise chilling underwater, has me thinking that this stunt involves Ethan Hunt either breaking into or out of The Sevastopol - the Russian sub that doubles as the current home of the AI menace known as “The Entity.”

The trailer for Tom Cruise's Mission: Impossible—The Final Reckoning may be hinting to another major character death after Ilsa Faust. Rebecca Ferguson’s Ilsa Faust dying in Mission: Impossible—Dead Reckoning Part One was one of the most painful moments in the franchise.

Impossible – The Final Reckoning, showcasing his underwater stunt training. The film, releasing in May 2025, marks the franchise's epic finale.