Special Agent Leroy Jethro Gibbs,Dr. Donald "Ducky" Mallard
Dr. Donald 'Ducky' Mallard: I wonder if Kate ... 
Special Agent Anthony DiNozzo: Wow, I haven't had a woman say that to me in a
... [DOC] [TLE] Old Friends and Lovers: Leroy Jethro Gibbs/Donald 'Ducky' Mallard ... [PAR] Oct 20, 2005 ... Special Agent Leroy Jethro Gibbs - Senior Field Agent Doctor Donald 'Ducky' 
Mallard - Medical Examiner Special Agent Anthony (Tony)... [DOC] [TLE] NCIS : Character Essay: Donald 'Ducky' Mallard - Partners Forever [PAR] Special Agent Leroy Jethro Gibbs - Senior Field Agent.