The final part of Secrets of the Bermuda Triangle looks at the effect of the Earth and its natural forces in the Bermuda Triangle. Ortis Deley finds out about powerful hurricanes which carve a deadly path through the triangle, and visits the only laboratory in the world capable of creating a Category 5 hurricane. He also goes in search of the lost city of Atlantis, thought to lie off the coastline of the Bahamas. Rick Edwards discovers why the Bermuda Triangle has earned a reputation for making compasses behave strangely.

Originally released by BBC, 2018. Streaming video file encoded with permission for digital streaming by Infobase on May 22, 2019.

Hurricanes (6:02); --Hurricane Research (6:18); -- Hurricane Preparation (2:10); -- Hurricane Record (4:26); -- British Colonization (2:12); -- Navigation Equipment (5:04); -- Shipwrecks in the Bermuda Triangle (9:24); -- Puerto Rico Trench (2:00); -- Bermuda Triangle and Atlantis (6:53); -- Credits: Secrets Of The Bermuda Triangle: Secrets Of The Deep (0:40);.