The phrase “a Tom Hanks war movie” usually brings certain standards to mind, and it's likely why "Greyhound" falls so short of those expectations. This World War II action film is among the most tedious war films I’ve ever encountered. The screenplay, penned by Hanks and adapted from C.S. Forester’s “The Good Shepherd,” tells a made-up story about Captain Krause (Hanks), an experienced Navy officer who finds himself in command of a U.S. destroyer for the first time. His job is to safeguard a convoy—thirty-six ships carrying thousands of soldiers and supplies—as it crosses the Atlantic. Krause and his crew must spend five days traversing dangerous waters without any aerial support, relying only on two other escort vessels in an area of the ocean known as the “Black Pit.” The situation deteriorates when the fleet comes under attack by German U-boats, triggering a prolonged conflict between ships and submarines. The narrative draws from events that occurred during the Battle of the Atlantic in the early years of WWII, but it isn't based on actual events. Adding to the disappointment, the film is simply average across the board. The original score (by Blake Neely) is awful, the special effects are lackluster, and the cinematography is depressing—the movie broadcasts a sense of being cheaply made. It lacks cinematic quality, and the production values feel inexpensive. Aaron Schneider’s direction is also lacking; he seems to have little grasp of how to build visual excitement or suspense. Consequently, the wartime action is uninspired and dull, and the whole project resembles a poorly assembled series of quick cuts. Hanks has created a character who lacks depth, resulting in Captain Krause primarily reciting Bible verses and issuing military commands. The film presumes familiarity with complicated military terminology, which makes it easy to lose interest. It also leans too heavily on religious themes, bordering on being a faith-based production. "Greyhound" essentially amounts to an extended, unexciting confrontation between a warship and submarines. There are many better war movies worth your time than this misfire.

Source on TMDB