U.S. Coast Guard recruits become heroes of the sea in "The Guardian (Blu-ray)" (2006). Oscar-winner Kevin Costner plays a gruff veteran of the Guard who, after an injury, decides to teach the new recruits everything he knows. His tough love puts the fearinto all but one cocky private, a rebellious championship swimmer played by Ashton Kutcher. Through their conflicts and missions, teacher and students find they can learn a lot from each other. Director Andrew Davis frames this thrilling military saga with some awesome at-sea rescue sequences.