Watch Transformers: The Last Knight (2017) HD Full Movie Free on SolarMovie. Watch Transformers: The Last Knight (2017) online free. A deadly threat from Earth's history reappears and a hunt for a lost artifact takes place between Au...A deadly threat from Earth's history reappears and a hunt for a lost artifact takes place between Autobots and Decepticons, while Optimus Prime encounters his creator in space.