A guide to the sites visited by the Oceans team in the Arctic Ocean. The Team head to this hostile and remote ocean where they plan to dive beneath the polar ice cap to explore how the ice, the dominant feature of this ocean, is shrinking and how this could affect the rest of the world. The team risks diving in sub zero temperatures to collect samples of the tiny creatures that are the basis of the Arctic's complex food chain.

• Mark Halliley
• Philippe Cousteau Jr.
• Paul Rose