When you watch NCIS Season 15 Episode 17 online, you pop in on Ducky in the midst of attempting to beat a publisher's deadline on his book with the help of a graduate assistant. However, Ducky is distracted by an episode of American Picker, where he notices Mike Wolfe handling a very distinct wooden club, a Viking war stick, that might very well be the missing murder weapon from a sixteen year old cold case he and Gibbs worked. Ducky immediately reunites with the rest of the team and the MCRT is on the case. They track down the war stick and bring it back for analysis, and it doesn't take long to confirm that this very valuable antique is, indeed, the weapon that killed a Navy sailor. It then becomes the team's mission to track the war stick back and figure out how it went from a fraternal organization's good luck charm to hanging in a woman's garage, and being used to kill a sailor somewhere in between. Meanwhile, Abby is discomfited to realize that while Ducky's assistant Kasie gets along with everyone else, she seems very distant to Abby, and the forensic scientist is determined to figure out why. Find out what happens when you watch NCIS Season 15 Episode 17 online!