Eons ago, Optimus Prime and Megatron were known as Orion Pax (voiced by Chris Hemsworth) and D-16 (Brian Tyree Henry), humble miner robots trying to sustain their people's subterranean existence, and dreaming of leading their return to Cybertron's ravaged surface. They'd get their chance--and the perilous quest that saw their friendship fissure into enmity is chronicled in this anticipated animated origin story. With the voices of Scarlett Johansson, Keegan-Michael Key, Steve Buscemi, Jon Hamm. 104 min. Widescreen; Soundtrack: English.