David Attenborough will be back on our screens with a sequel to The Blue Planet

We're being treated to a seven-part series.

Given that Planet Earth II was arguably the best show of 2016, audiences were left wondering when we would be graced again with the dulcet tones and utterly mesmeric presence of Sir David Attenborough. Great news because the gifted broadcaster is back and he's going to be narrating a seven-part series on an ecosystem that he's extremely familiar with in Blue Planet II, the sea. "I am truly thrilled to be joining this new exploration of the underwater worlds which cover most of our planet, yet are still its least known," Sir David said. The BBC's Natural History Unit spent four years filming off every continent and in every ocean for Blue Planet II, with support from marine scientists. We've been promised "unbelievable new places, extraordinary new behaviours and remarkable new creatures. Showing a contemporary portrait of marine life, it will provide a timely reminder that this is a critical moment for the health of the world's oceans." In terms of technical innovations, there's going to be suction cameras fitted to the backs of orcas and new filming techniques like "tow cams" that can capture an exquisite head-on view of predatory fish and dolphins. Sir David and his team will also explore new landscapes that range from methane volcanoes erupting in the Gulf of Mexico to the Antarctic deep at 1,000m. The sequel will be broadcast on BBC One later this year. Image via - BBC