Greyhound gets a surprise sequel update as a filming start and plot details have been revealed. Written by and starring Tom Hanks, the World War II film follows an inexperienced U.S. Navy commander leading an Allied convoy of warships being stalked by German submarines during the Battle of the Atlantic, with the cast also including Stephen Graham, Rob Morgan, and Elisabeth Shue. Greyhound was released on Apple TV+ in 2020 and, after becoming one of their biggest movies ever, a sequel entered development in 2022.