The Michael-Bay-directed Transformers franchise returns this summer. In this latest installment, Optimus Prime is gone, and without his leadership, the Transformers are at war with humans. The fate of the world depends on discovering the secret, hidden roots of the Transformers on Earth. This fifth film in the series stars Mark Wahlberg as Cade Yeager, an inventor who forms a partnership with an Oxford professor, Bumblebee, and an English lord to save the world in Bay’s last work of the franchise.