When Ducky determines that one of his research cadavers was the victim of murder, the NCIS team uncovers a web of criminal intrigue.

Despite Alan's warnings, Walden starts dating Rose (recurring guest star MELANIE LYNSKEY).

The NCIS team is given a 22-hour deadline after the murder investigation of a Chief Warrant Officer who specialized in counterintelligence reveals his wife had been kidnapped and is being held for ransom. Meanwhile, Senior FBI Agent Fornell travels to the Big Easy to assist with the case. 

Christy goes on her first date since she stopped drinking. Meanwhile, Bonnie teaches her grandson Roscoe to gamble. Justin Long guest stars as her date, Adam.

When Melanie sends gifts to the football team on behalf of Derwin in honor of the first game, Derwin gets teased and his teammates Jason and Malik feel pressured to reciprocate. A gift giving competition ensues.

When Marjorie's overly competitive sister, Eileen, comes to visit, their sibling rivalry gets the better of them and forces their families to lie to each another. Jane Kaczmarek guest stars.

The Millennials discover a huge secret about Jack's love life when they clean out his decades-old storage unit. Also, Clark and Mason use Jack's memorabilia to throw an epic '90s-themed party at Eddie's bar.

Abby and Nick have their respective significant others spend time with Billie and Zack to prevent them from finding out about the surprise shower they are planning. However, their plan backfires when both Billie and Zack dislike their new buddies.