Tyrone Power made his last screen appearance before a three-year stretch in the Marines in this World War II drama. Lt. Ward Stewart ( Tyrone Power ) has served with distinction as the commander of a PT boat, so his uncle, Adm. Bob Stewart ( Minor Watson ), gives him a new and more challenging assignment aboard a submarine. Before shipping out, Ward enjoys a night on the town, where he meets and romances a pretty schoolteacher, Jean Hewlett ( Anne Baxter ). However, when Ward reports for duty, he discovers he'll be serving under Lt. Cmdr. Dewey Connors ( Dana Andrews ), who happens to be Jean's boyfriend. On leave and on land, Ward and Dewey are soon caught up in a romantic rivalry, while on duty and under the water they must work together to ferret out Nazi U-boats. Crash Dive received an Academy Award nomination for the special effects work in the film's battle sequences. — Mark Deming