Critics review the latest film releases: “Challengers,” “Uncropped,” “Egoist,” and “Alien” (re-release). The Supreme Court justices grant that presidents have some immunity when it comes to prosecution, but differ in how much and when it applies. A New York appeals court has overturned the rape conviction against Harvey Weinstein, saying a judge mistakenly allowed women who were not part of the charges to testify that the former Hollywood producer abused them. More than a dozen horses died during the 2023 racing season at events like the Kentucky Derby and the Belmont Stakes. A new documentary looks at what’s behind the crisis.