Gibbs sits out of an investigation in order to help Fornell on NCIS. "Cabin Fever" is the 15th episode of the show's 12th season.

When do you ever remember Gibbs sitting out on an investigation. He must be seriously worried about Fornell.

From the looks of things, it appears that Gibbs is right. Fornell is having a very difficult time handling his ex-wife's death.

Thankfully, Gibbs has the rest of the team there to handle the latest investigation. And we're loving Abby's new black heart shirt.

Tony and the entire team will have to step up their game when Gibbs' arch-nemesis is behind an explosion at a summit for global terror event.

When Gibbs learns who is the target of the latest investigation, will he come running back or let his team handle it?

If anyone should understand dealing with grief, it has to be Gibbs and Director Vance who have both lost loved ones.