Greg Foot takes you on a scientific adventure diving down into the deep dark ocean. The documentary starts on the deck of the Baseline Explorer, and from there you go into the waves and dive down.
The documentary goes as deep as underwater volcano 250m under the surface, in the Twilight Zone just off the coast of Bermuda. The deep sea is the lowest layer in the ocean, exiting below the thermocline and above the seabed.
You can find a lot of unique creatures living below the photic zone of the ocean. They survive in extremely harsh conditions. And this hi-tech submarine gives you a close view to all of them.