When talking about the Heart Drawing, Ducky speaks Latin to Jimmy. In the UK Latin was taught as standard as part of Medical training until the early 1990s so character wise this is factually correct. In real life David McCallum can speak fluent Latin as it was compulsorily taught as a school subject in the UK as standard up until the mid 1980s.
This episode contains a plot element involving escorting the remains of a fallen Marine. Emily Wickersham had a small role in Taking Chance (2009), a movie about a Marine escort.