Eph makes plans to take the virus to the military in Washington, but Nora insists on staying behind with Zach. Meanwhile, Kowalski asks Vasiliy and Dutch for help, and Eldritch takes Coco out for dinner.moreless
When a former Marine turned homeless is murdered, Kensi and Deeks go undercover for the investigation and find a link to the Mexican cartel.
Tammy returns to town with the surprise announcement that she and Ray are getting married this coming weekend. Meanwhile, jury selection begins for for the Patrick Walker case and Joey struggles with acting as a witness to support Patrick's claim that he was framed. If Joey testifies, he might be exposed as a mob family leader and if he does not, Patrick faces a much stronger likelihood of being convicted.moreless
Abby is back and agrees to join Mitch in getting Patrick Walker off so that they will finally be free of the Morolto family. Meanwhile, Patrick and Joey drop a bomb on Mitch: during his college years, Patrick was investigated for an incident very similar to the one he is accused of committing in the current case. Ray and Abby look into the backgrounds of the murder victim and Patrick's accuser from his college days.moreless