Immortality is the two-hour series finale of CSI: Crime Scene Investigation aired on September 27, 2015 on CBS.
When a suicide bomber detonates his vest on the floor of the Catherine Willows-owned Eclipse casino, the FBI special agent returns from Los Angeles to join the investigation. Gil Grissom, meanwhile, working to preserve sharks in international waters, is arrested for trespassing at the Port of San Diego, and D.B. Russell offers Sara Sidle the chance to supervise the local investigation into the bombing. Sidle, who is vying for the position of director of the Las Vegas Crime Lab, is initially irked when Sheriff Conrad Ecklie inquires as to Grissom's location when "Lady" Heather Kessler is linked to the crime. Ecklie ensures Grissom is released from custody, and Willows and he, alongside Eclipse security officer Jim Brass, assist in locating the suspect.
