CSI Crime Scene Investigation The CSIs investigate a woman's death as the work of a serial killer. 2026-10-25 Following a near-death experience, Mac becomes determined to close his last remaining unsolved case, on the seventh season finale. 2026-10-25 Mac, Aiden and Flack investigate when Elaine Curtis is found dead at a dog competition, a knitting needle sticking out of her chest, and no shortage of suspects ranging from judges to trainers to contestants. 2026-10-25