The team members search for a vengeful suspect who was once abused; Garcia travels to Texas to confront the person she shot.
The NCIS team consult with three cyber-terrorists they imprisoned after a citywide Internet shutdown, the week before Christmas. McGee reflects on the case and Gibbs' infamous rules as he pens a heartfelt letter to his father.
Gen. Fitzgerald goes to the firm for help when the Army threatens to discharge him after he reveals his homosexuality; Carl asks Katie to assist a new associate in a custody battle over a 9-year-old bullfighter; Alan finds himself speaking gibberish.
When an employee of Morley Tobacco Co is apparently killed by tobacco beetles, Mulder suspects that the beetles have hatched inside his lungs and found their way there through inhalation of smoke from an experimental cigarette.