Clay Williamson
Gender: Male   Male
Status: Retired.
Portrayed by: n/a
 First Appearance
  ●   NCIS: UnSEALeD (episode)- (mentioned only).
 Last Appearance
  ●   NCIS: UnSEALeD (episode)- (mentioned only).

Clay Williamson was an NCIS Special Agent who investigated the deaths of Margaret Curtin and a cable repairman three years prior to the events of UnSEALeD (episode).

During a talk with Leroy Jethro Gibbs, Special Agent Timothy McGee mentioned that Williamson had retired from NCIS and was now living on a boat, collecting his mail every three months in Tahiti.