Most Gen Xers will remember with fondness the infamous “Brat Pack,” a group of young stars who ruled the entertainment world back in the mid-1980s. Nobody was bigger than these actors, including Rob Lowe, Ally Sheedy, Demi Moore, Emilio Estevez, Molly Ringwald, and Judd Nelson. But with that superstardom and unfortunate moniker came decades of sadness, regret, and pain. One of the original members of the Pack, Andrew McCarthy, decided to make a film to deal with the group’s shared experiences after being collectively labeled by an article in New York magazine in 1985. The result is “Brats,”...