 The final episode quickly shifts into an enlightening behind-the-scenes talk between National Geographic expert Dr. Alex Schnell and director Cameron as they review footage for the series. Cameron, already involved in the previous two Secrets of entries, seems ideal for an examination of octopuses. He describes part of their appeal as alien, and his own explorations in deep water for both Titanic and the Avatar movies led him to a conclusion that the ocean has much more to teach people.