SUN Perfect Planet, BBC One, 8pm

Epic nature documentary. This week: Oceans: Oceans are the largest ecosystem on earth, covering two thirds of our world’s surface and providing half the oxygen in our atmosphere. They’re home to as much as 80 percent of all life on earth, and nearly three billion people rely on them for their primary source of food.

Lightning, BBC Two, 6.30pm

Comedian Zoe Lyons (pictured) hosts the quiz where six plucky contestants must stay out of the light to be alright. Can anyone beat the lightning and win the £3,000 jackpot? In each nerveshredding round, contestants aim to pass the dreaded light from themselves onto a rival of their choice.

Gregg takes a 300-kilometre road trip along the stunning coast of the Western

Cape heading for Gansbaai, otherwise known as Shark Town.

He also releases rehabilitated African Penguins back into the

wild.