Greyhound is a 2020 American war film directed by Aaron Schneider and starring Tom Hanks, who also wrote the screenplay. The film is based on the 1955 novel The Good Shepherd by C. S. Forester, and also stars Stephen Graham, Rob Morgan, and Elisabeth Shue. The plot follows a commander of the US Navy on his first war-time assignment in command of a multi-national escort group defending a merchant ship convoy under attack by submarines in early-1942 during the Battle of the Atlantic, only months after the U.S. officially entered World War II. Greyhound was initially scheduled to be theatrically released in the United States on June 12, 2020 by Sony Pictures Releasing, but was eventually cancelled due to the COVID-19 pandemic after previously being delayed indefinitely. The distribution rights were then sold to Apple TV+, which released the film digitally on July 10, 2020. It received generally positive reviews from critics, with praise for the action sequences and effective use of the 90-minute runtime.