September 2026 is shaping up to be a major month for 4K Blu-ray releases, with a range of films and shows set to be tested and reviewed. These discs offer a chance to see how the latest high-definition technology can enhance both visuals and sound. Among the highlights are "Supergirl," "Hamilton," "12 Angry Men (1957)," "Star Wars: The Mandalorian & Grogu," and "28 Days Later," each bringing unique features and showcasing the capabilities of 4K Blu-ray. "Supergirl," starring Milly Alcock, will be available in the UK on September 7 and in the US on September 8. The film is expected to display vivid colors and expansive space scenes that can highlight the contrast of a 4K TV. It also supports Dolby Atmos, an advanced audio format that provides a more immersive listening experience. "Hamilton," a critically acclaimed stage musical about the life of Alexander Hamilton, will be released in the UK on September 21 and in the US on June 26. This release includes Dolby Vision and Dolby Atmos, which can enhance the visual details of the period costumes and the audio experience of the musical's blend of hip-hop, jazz, and traditional Broadway styles. "12 Angry Men (1957)," a classic courtroom drama, will be available in the UK on September 14 and in the US on September 8. The film supports Dolby Vision, which can improve the black and white visuals with strong contrast, though the original soundtrack is monaural, meaning it has only one audio channel. Other notable releases include "Star Wars: The Mandalorian & Grogu," which will be available in the US on August 25 and in the UK on September 28, and "28 Days Later," set for release in the US on September 1 and in the UK on August 31. These and other titles will offer a variety of visual and audio experiences, with release dates varying by region.