en CB01 OFFICIAL. This feature-length documentary offers a glimpse at the unknown world that lies beneath the Arctic ice. Arctic IV follows Dr. Joseph MacInnis, a specialist in underwater medicine, as he probes and explores the polar depth. Filmed at Resolute Bay, Dr. MacInnis and his team must chip through 2 metres of ice and dive into the frigid, watery depth at the North Pole - all in the name of science.