Ocean Giants is a 2011 British nature documentary series narrated by actor Stephen Fry. The series is a production of the BBC Natural History Unit, and premiered on 14 August 2011. The documentaries focus on the life of dolphins and whales. The series includes film crew members who worked on the series Planet Earth. The cameramen featured in the show are Doug Allen, a winner of four Emmys and four BAFTAs for his work on filming marine mammals, and Didier Noirot, known for working with marine conservationist Jacques Cousteau.

The series consists of three episodes, each an hour long. The first episode, Giant Lives, focuses on humpback whales and blue whales, The second, Deep Thinkers, explores the cognitive abilities of dolphins. The third and final episode, Voices of the Sea, investigates the vocalizations of dolphins and whales. The series was released on DVD and Blu-ray on 6 March 2012 by BBC Home Entertainment, but only for the United States.