Roughly 3.19 million barrels of oil leaked directly from the ocean floor over the course of 87 days before the wellhead was finally capped.
If you are looking for information on the 5-part BBC miniseries: Season 22010
If you meant the monumental deep-water drilling crisis in the Gulf of Mexico: Roughly 3
Which specific topic or are you looking to explore? Deepwater Horizon Oil Spill - Smithsonian Ocean Season 22010