The CSI crew is stumped when they discover a disembodied brain at a crime scene where all the other brains are accounted for.

When a photo of a dead college student starts trending on the Internet, the team steps in to investigate.

D.B. Russell leads the CSI team on a hunt to find his kidnapped granddaughter.

Things get personal when D.B. Russell is drawn into the investigation of the death of his son's basketball coach.