Transformers Prime - Series 2 - Orion Pax (DVD)

When Optimus' memory is erased, the sinister Megatron manipulates him into joining the Decepticons. Jack and Acree travel to Cybertron to find the legendary super-computer Vector Sigma, and the Autobots devise a risky plan to get their leader back. From Hasbro Studios and the writing team behind the mega-blockbuster Transformers feature films comes and all new series of stunning, computer-animated adventures for Optimus Prime and his team of Autobots as they battle against their nemeses the Decepticons and their villainous leader Megatron.

Episodes - Orion Pax: Part 1, Part 2 and Part 3, Operation Bumblebee: Part 1, Part 2, Loose Cannons and Crossfire