Librarian Note: There is more than one author with this name. David McCallum is a Scottish actor best known for playing Russian spy Illya Kuryakin in the television series The Man from U.N.C.L.E. (1964-1968) and medical examiner Dr. Donald "Ducky" Mallard on NCIS (2003- ). In addition too his work as an audio-book narrator, McCallum's debut novel, Once a Crooked Man, was published in 2016.