Many of the BBC's documentaries are excellent. Here are some of the well-received BBC documentaries you can refer to: Human Planet: A documentary about humans that covers human activities in space, on Earth, and on other planets. 2. World War II: A documentary about World War II, about the cruelty, impact, and lessons of war. 3 Animal Planet: A documentary about animals that covers the habits, behavior, and ecology of animals. 4 Nature: A documentary about nature that covers the beauty and complexity of nature, including natural disasters, biotechnology, and climate change. 5 The Future: Science and Security: A documentary on technological development and security issues that explored the challenges and opportunities that the future might face. 6 Star Trek: A sci-fi documentary about human exploration and adventure in the universe. 7 The Earth: Our Children's Health: A documentary on environmental protection that explored human impact on the planet and protective measures. 8 Red Planet: A documentary about polar animals that survive and reproduce in extremely cold environments. These are just a few of the many excellent documentaries from BBC. If you are interested, you can search for more related documentaries online.