The blue planet team join predators in their search for the sardine run off the coast of South Africa. Read about the producers who made this stunning series. You can download RealPlayer for free here follow the links for the basic player.

Cameramen Doug Allan and Tom Fitz are the first to film one of the most legendary but previously unfilmed events in the sea - killer whales attacking a grey whale calf. Californian whale scientist Nancy Black knew of this behaviour but had only seen one complete attack in 14 years. Over two seasons and for several months the crew, directed by Sue Flood, film in the deep waters of Monterey Bay where the attacks are known to happen.