《海底大揭秘第四季》由Yavar Abbas,Steven Clarke,Catrin Evans,Anna Jeffries,Christopher Riley,Adam Warner,Alex West,Chris Thorburn,Tomasz Cebula,Wayne Derrick导演，于2021 年在英国 上线，是一部纪录片电影，用语是英语。　　Combining undersea exploration with innovative visualizations, DRAIN THE OCEANS reveals hidden evidence of amazing undersea mysteries.　　Not “artists impressions” but what is actually there — down to the very last rivet. And, for its fourth season, it embraces a gripping new style, telling stories purely through the words of explorers and archaeologists, putting viewers right by their side.