The first season of CSI: Crime Scene Investigation premiered on CBS on October 6, 2000, and ended on May 17, 2001. It was rereleased on Blu-ray on May 12, 2009.This is the only season of the CSI franchise that was broadcast in the 4:3 aspect ratio. It was, however, filmed in 16:9, and the widescreen versions of the episodes are present on the Blu-ray release.[2]