As the NCIS Director returns from a controversial European junket, and Gibbs and his agents reluctantly prepare for Homeland Security polygraph tests, tightly woven secrets among the team unravel.
Deena's mother (Meredith Baxter) visits, unaware that she and Dave are back together; Brian gets invitations from his two attractive downstairs neighbors; Adam and Nicole deal with the aftermath of their tryst.
Stephanie's manager instructs her not to be seen in public with Brian after an embarrassing photo of them runs in the tabloids; Nicole helps Deena attract customers to her new cupcake store.
Of his close-knit group of friends, everyone else has paired off, while Brian has emerged as the last bachelor standing. At 34, regardless of his run of bad luck in matters of the heart, Brian O'Hara still holds out hope that one day he'll open the door and be blinded by love.
Dave and Deena's plan for a secret getaway to renew their wedding vows turns chaotic; Natasha interrupts Brian and Adam while they are baby-sitting; overwhelmed Nicole does not have help to tend to many new customers.