Join PBS Nature, as it dives into the world of whales and dolphins, and reveals the secrets of their intimate lives like never before. Watch a preview of Ocean Giants.

Human lives have been influenced by animals in matters that reach far beyond the food chain. In surprising ways, animals help teach, heal, and strengthen people -- in body, mind, and spirit.

Filmmaker Hardy Jones used his camera as a tool for conservation, filming dramatic dolphin hunts and documenting the effects of chemical pollution on dolphins and orcas.

Discover the remarkable complexity of dolphins' communication, human-like nature, and the controversy surrounding captive dolphins.