IMDb.com makes a brief appearance in this episode when McGee looks up the alias of a suspect, who used a character name from a film.
McGee is left handed. He probably wouldn't be able to use Ducky's golf clubs anyway--because Ducky is right handed. But there's a chance that his motor skills are right dominant. But unlikely considering he shoots left-handed.
The original NCIS investigation belonged to Agent Paula Cassidy four years prior to this event. Agent Cassidy's death in season four was during the 19th episode of the season; one could say almost exactly 2 yrs prior to this case.
Kendall Ryan Sanders (Zane) also guest starred in an episode of Modern Family, where Rico Rodriguez (Travis Buckley) was a main character.