David Attenborough: A Life on Our Planet

This powerful documentary finds the much-loved and well-respected natural historian in a somber mood. For the first two thirds of David Attenborough: A Life on Our Planet, Attenborough doesn't sugarcoat the negative impact humans have had on the natural environment. Talk of lost species, uninhabitable areas, and irreversible damage are backed up with increasingly depressing facts and figures projected on screen. While the documentary provides a chance for the the 93-year-old to look back on his remarkable life -- archive footage provides some of the film's more lighter moments -- this is less a celebration, more a warning.

One of Attenborough's biggest strengths has always been his ability to replicate the emotions of the viewer. He looks just as excited when encountering a rare species as we are witnessing it on screen. It's why, when talking directly to camera, his desperate plea for change is so hard hitting. Yet despite the gloomy future portrayed, the final third of the film offers hope. Hope that is delivered inspiringly by the man himself. Change, he argues is not an option, it is a necessity. But it can be done -- Attenborough lists a number of ways in which people can help. Attenborough calls A Life on Our Planet his witness statement. It's also perhaps his most important film yet.