In the age of streaming, there’s a widespread belief that every movie is available, all the time, everywhere. Don’t fall for it! Some of the greatest movies ever made are nowhere to be found due to everything from music rights snafus to corporate negligence. In this column, we take a look at films currently out-of-print on physical media and unavailable on any streaming platform in an effort to draw attention to them and say to their rights holders, “Release This!”

When Peter Bogdanovich‘s musical “At Long Last Love” opened in 1975, the verdict was nearly unanimous — critics agreed that the wunderkind behind “The Last Picture Show,” “What’s Up, Doc?” and “Paper Moon” had badly stumbled in his attempt to revive the style of 1930s Ernst Lubitsch musicals like “The Love Parade” and “The Merry Widow.” Even Roger Ebert, who gave the movie one of its more sympathetic reviews,...