Charlie Chaplin, the silent screen's "Little Tramp," was beloved by millions of movie fans until he starred in a salacious, real-life federal courtroom drama. The 1944 trial was described by ace New York Daily News reporter Florabel Muir as "the best show in town." The leading lady was a woman under contract to his studio-red-haired ingenue Joan Barry, Chaplin's protegee and former mistress. Although he beat the federal criminal trial, Chaplin lost a paternity case and had to pay child support despite blood type evidence that proved he was not the child's father.

A decade later during the Cold War, the U.S. government used the Barry trials as an excuse to bar the left-leaning, sexually adventurous, British-born comic from the country he had called home for forty years. Not only did these trials have a lasting impact on law; they also raise concerns about the power of celebrity, Cold War politics, the media frenzy surrounding high-profile court proceedings, and the sorry history of the casting couch. When Charlie Met Joan examines these trials from the perspective of both parties, asking whether Chaplin was unfairly persecuted by the government because of his left-leaning political beliefs, or if he should have been held more accountable for his cavalier treatment of Barry and other women in his life?