David Keith McCallum, Jr. (born 19 September 1933) is a Scottish actor and musician. He first gained recognition in the 1960s for playing Russian spy Illya Kuryakin in the television series The Man from U.N.C.L.E. and as interdimensional operative Steel in Sapphire & Steel.
https://en.wikipedia.org/wiki/David_McCallum
A flashback into the life of Dr. Donald Mallard is abound on NCIS season 12. We learned that The CBS series has tapped Mixology actor Brit Adam Campbell to play young Ducky in an October episode. The flashbacks will shed light on Ducky’s past relationships as well as reveal… why he always wears bow ties.
http://www.spoilersguide.com/ncis/taps-mixology-actor-to-play-young-ducky-in-season-12/
Dr. Donald Ducky Mallard (David McCallum) is the chief medical examiner at NCIS. His nickname Ducky, which the NCIS team addresses him as, is a play on his last name Mallard. When he was younger he went by Donnie.
https://en.wikipedia.org/wiki/Ducky_Mallard
David McCallum (I) Actor | Soundtrack. Since David McCallum's father, David McCallum Sr., was first violinist for the London Philharmonic and his mother, Dorothy Dorman, was a cellist, it's not surprising that David was originally headed for a career in music, playing oboe. He studied briefly at the Royal Academy of Music.
http://www.imdb.com/name/nm0564724/
Ziva David (Cote de Pablo) initially holds the post of Mossad Liaison Officer to NCIS, to which she is appointed following the murder of Special Agent Caitlin Todd by a rogue Mossad operative named Ari Haswari.
https://en.wikipedia.org/wiki/Ducky_Mallard
Jennifer Jenny Shepard (Lauren Holly) first appears in the episode Kill Ari (Part I). She replaces former NCIS director Thomas Morrow at the start of season three after Morrow takes a Deputy Director's position with the Department of Homeland Security.
https://en.wikipedia.org/wiki/Ducky_Mallard
The series premiered on September 23, 2003 featuring an ensemble cast which has included Mark Harmon, Sasha Alexander, Michael Weatherly, Cote de Pablo, Pauley Perrette, Sean Murray, Lauren Holly, Brian Dietzen, Emily Wickersham, with Rocky Carroll, and David McCallum.
https://en.wikipedia.org/wiki/Ducky_Mallard
David McCallum stars as Ducky, a medical examiner with the Naval Criminal Investigative Service in Paramount Television's top-rated drama series NCIS, a Belisarius Production in association with Paramount Television for CBS-TV. Dr. Mallard relishes everything he does.
http://www.usanetwork.com/ncis/cast/dr-donald-mallard
Ducky lives with his aging mother and her corgis until season six. In the episode Broken Bird, Ducky reveals that his mother has moved out and has Alzheimer's disease. Nina Foch, the actress who played Ducky's mother, died on December 5, 2008, necessitating the change.
https://en.wikipedia.org/wiki/Ducky_Mallard
Dr. Donald Mallard. Dr. Donald Ducky Mallard (David McCallum), who has great respect for the dearly departed. He is the medical examiner at NCIS and has seen it all. His focus and judgment is always certain.
http://www.usanetwork.com/ncis/cast/dr-donald-mallard
who plays young dr mallard on ncis
David McCallum plays young Dr. Mallard on NCIS. David McCallum plays young Dr Mallard on NCIS.