CSI: Crime Scene Investigation is a procedural and forensics crime drama, the first in the CSI franchise. The series introduces audiences to beloved characters like Gil Grissom, Catherine Willows, and Sara Sidle. Unlike other procedural dramas, CSI focused more on the forensics investigation of disturbing crimes. Episodes like "Sqweegel" and "Blood Drops" have gone down as some of the scariest CSI episodes.
Source：https://www.cbr.com/csi-darkest-disturbing-scary-episodes/
