While investigating the death of an intruder at Quantico, Jimmy and Kasie are exposed to a deadly biotoxin, trapping them in the lab. With time running out, the NCIS team calls on Doctor Carol Wilson for help as they race to find the antidote. As that goes on, Torres tries to distract Jimmy's daughter who came to the office to spend the day with her father.
Prologue
Act One
Act Two
Act Three
Act Four
Act Five
Trivia
Despite being credited, neither Mark Harmon nor David McCallum appear in this episode.