Traveling the immense space and unlimited time, the hero explores other worlds. He ruthlessly fights with different creatures alien origin that pose a greater threat to the existence of mankind on Earth. He resist Cybermen from the future, as well as the aliens away.
Doctor doing its utmost to protect the people faced with a serious danger. Dr. protects the planet from invasion and total intervention of foreign creatures who dream to take over the planet. Over the last 800 episodes of the series, he has faithfully fulfilled its mission.