Special Agent Leroy Jethro Gibbs,Dr. Donald "Ducky" Mallard
[DOC] [TLE] Donald Mallard | NCIS Database | Fandom powered by Wikia [PAR] Donald "Ducky" Mallard is a Doctor and also the official Medical Examiner for the 
... Major Case Response Team led by NCIS Special Agent Leroy Jethro Gibbs.