Ellie and Tony work to stop a large scale attack on NCIS. "Kill Chain" is the 12th episode of the show's 11th season.

How is Parsa linked to this case on NCIS? "Kill Chain" is the 12th episode of the show's 11th season.

Tony and Ellie are in the field to stop a terrorist plot on NCIS. "Kill Chain" is the 12th episode of the show's 11th season.

Gibbs' team works with the Department of Defense to stop Parsa on NCIS. "Kill Chain" is the 12th episode of the show's 11th season.

Ellie and Abby dissect the drone on NCIS. "Kill Chain" is the 12th episode of the show's 11th season.

The actor/exec producer appeared for a panel to discuss NCIS: New Orleans,

Jimmy Bishop is at work. This is a photo from NCIS.

Mark Harmon was a star long before he signed up for NCIS. Die hard fans might remember him from the primetime soap Flamingo Road, Dr. Caldwell for St. Elsewhere, or the third wheel in the Dave and Maddie triangle on Moonlighting. However, we're still mourning his untimely death as Agent Simon Donovan, CJ's romantic interest on The West Wing.

Sean played Zane Grey on Harts of the West in the early '90s and later had guest roles on Silk Stalkings and ER before spending time on JAG and eventually landing at NCIS

As much as we love Ducky, David McCallum had a long career before taking on the good doctor. Many will remember his as Illya Kuryakin on the 1960s hit The Man from U.N.C.L.E..

Before he was Tony DiNozzo, Michael started out as Theo Huxtable's roommate on The Cosby Show. He then spent time in The City (formerly the ABC soap Loving) and then opposite Jessica Alba in Dark Angel.

David McCallum portrays the character of Ducky on NCIS. He's an anthropologist.