Transformers: Cybertron

Watch Transformers: Cybertron: A Black Hole is threatening the universe, Optimus Prime and the Autobots have to take refuge on Earth and keep their existence hidden from the inhabitants. The Autobots are visited by the ancient Autobot named Vector Prime who tells them that the only way to stop the Black Hole is to find the 4 Cyber Planet Keys. However, the evil Megatron and his Decepticons are after the Cyber Planet Keys too. They'll have to find their locations on Earth, Speed Planet, Jungle Planet and Giant Planet to determine the fate of the universe.