Series 1, Episode 2. See how the crew captured over 1000 hours of footage of deep-sea marine life, in depths of over three-quarters of a mile, using research vessels and submersives during an incredible, ambitious mission. 2/6. A fascinating look at the stories behind Blue Planet II's most memorable moments. Discover what went into creating this stunning series, as the crews reveal the lengths they went to and the groundbreaking technology they used to capture incredible footage around the world.