In addition to performing autopsies on the victims, Ducky composes a psychological profile on any potential suspects or criminals that the team encounter, having graduated after taking a forensic psychology course.
Born in Scotland to Victoria Mallard and Joseph Mallard, Ducky grew up in Scotland.
His parents presumably later divorced with Joseph remarrying a woman named Lorraine with that marriage producing a son, Nicholas who is Ducky's half-brother.
He was educated at Eton College, and subsequently graduated from University of Edinburgh's Medical School. He also attended Kings College, Cambridge for a year before leaving to go to medical school he started to study English Language and History.
Ducky also worked with several other other organizations including the British police and also served in the military during the Vietnam War although whether he served in the American military is unknown.
Ducky also served as an officer in "The Regiment", implying he served in the British SAS.
In 1980, Ducky worked in a refugee camp in Afghanistan and while there, he became acquainted with Polish born CIA interrogator, Marcin Jerek who was known locally as "Mr. Pain."
As a result of this acquaintance Ducky was later mistakenly charged with war crimes for violating Article Four of the 1949 Geneva Conventions by the government of Afghanistan.
Jerek tortured an innocent man who would then be sent to Ducky for medical care.
Under stress, Ducky eventually made the decision to end the young man's suffering by giving him an overdose of morphine which apparently caused his death, a decision which would haunt Ducky for years.
After his time in Afghanistan, Ducky presumably headed to the United States where he joined NCIS.
While there, he worked a series of cases under the guidance of the Medical Examiner, Dr. Walter Magnus.
Once Magnus retired, Ducky became his successor and has continued to hold the position of M.E. to this day.
JAG Season 8Edit
Ducky made his debut appearance in the JAG Season 8/NCIS backdoor pilot episode, Ice Queen (episode) where he was seen examining the body of a woman that had been at a tree in Potomac Park.
While at the scene, Ducky was able to determine that the woman had been pregnant.
NCIS Season 1Edit
NCIS Season 2Edit
NCIS Season 3Edit
In the Season 3 premiere episode, Kill Ari Part 1 (episode), Ducky entered the morgue and after taking off his glasses, remarked to Kate's body that he was so very sorry.
NCIS Season 4Edit
NCIS Season 5Edit
NCIS Season 6Edit
NCIS Season 7Edit
NCIS Season 8Edit
NCIS Season 9Edit
NCIS Season 10Edit
In the Season 10 premiere episode, Extreme Prejudice (episode), Ducky was seen in a hospital bed, Palmer having managed to find and save Ducky from certain death.
NCIS Season 11Edit
NCIS Season 12Edit
NCIS Season 13Edit
NCIS: New Orleans Season 1Edit
Ducky appeared in the NCIS: New Orleans Season 1 premiere episode, "Musician Heal Thyself" where he helped the NCIS New Orleans Team led by NCIS Special Agent Dwayne Cassius Pride investigate the case of a murdered Navy officer, Petty Officer Second Class Calvin Parks who Pride had mentored with the interview conducting thanks to a video conference call that had Dr. Loretta Wade who was autopsying Parks's remains in her morgue in New Orleans talking to Ducky who was in the NCIS morgue in Washington D.C.
A man in his seventies or eighties, Ducky is a man with short brown hair and blue eyes.
He often wears business suits and bowties as well.
Whenever he's in the field, Ducky is seen wearing a coat that states "NCIS Medical Examiner. Dr. D. Mallard".
As NCIS's Medical Examiner, Ducky is skilled at performing autopsies on the many victims that he examines with his findings often determining if the victim died of natural causes or if they were murdered.
Ducky also has a Psychological degree, enabling him to perform and create psychological profiles to determine the mindset of the suspects that the NCIS team are currently after which has often come in handy.
Ducky's specialty is performing autopsies with his results often helping the NCIS team pursue other lines of investigation with Ducky himself often determining if the death of a United States Marine Corps or Navy officer was natural or murder.
Psychological Profiling Edit
Having earned a Masters Degree in psychological profiling, Ducky is now capable of creating profiles in which will describe the suspect that the main NCIS team are searching for.
Medical Training Edit
Despite being a Medical Examiner, Ducky's medical skills as a Doctor have often been a source great use to members of the NCIS team as he has often treated injuries that the NCIS team have often received.