Blue Planet Marathon - Bear Pit
5pm THE BLUE PLANET
This opening episode touches on all aspects of the oceans to reveal the sheer scale, power and complexity of The Blue Planet
6pm THE DEEP
The deep remains the least known of all the ocean habitats. It is an eerie world where animals play hide and seek and where predators with massive teeth and enormous mouths lurk like patient rat-traps, waiting for their prey.
7pm OPEN OCEAN
In this marine desert there is nothing save the burning sun above and the blackened abyss below - yet here live many of the most spectacular predators in the ocean.
8pm FROZEN SEAS
For the first time, the frozen worlds of the Arctic and Antarctic are compared, where the annual freeze and retreat of the sea governs the pace of life. With winter temperatures plummeting to 70 degrees celcius below freezing, relief only comes with the brief respite of spring.