CGIS and NCIS team up after a helicopter crew is reported adrift at sea and later discovered on shore. The agents must then determine the cause of the crash and locate the missing pilot.

While on medical leave, Ducky orders the exhumation of a Navy commander’s body from a case closed 12 years ago, then takes on a different role in the investigation.

When the body of a missing NCIS facilities manager is found four months after disappearing on the day of the Navy Yard bombings, the team is assigned to investigate the strange case for one of their own.

After Dearing’s bomb destroyed NCIS headquarters, the emotionally and physically distraught team must pick up the pieces and hunt for the elusive suspect.