The Guardian starts off strong with an engaging introduction that pulls you into the world of elite rescue swimmers. The setup is solid, and the first act does a great job establishing the stakes. But once the second act kicks in, the momentum slows down as the focus shifts almost entirely to training sequences. While these moments have some depth …

Kevin Costner is "Randall", a veteran coast guard life saver who is given a training assignment after an attempted rescue doesn't quite go to plan. Reluctantly, he has to lick a bunch of new recruits into shape and, of course, there is one "Jake" (Ashton Kutcher) - a cocky, self-assured school swimming star for him to groom. Snag is - there is simp…