But the way he avenged those deaths might be considered even worse.
How will the show continue on without his many rules?
After all, everyone has their own idea of what the “worst thing” really is.
The Worst Things Gibbs Has Ever Done On NCIS
"NCIS" commander Leroy Jethro Gibbs is one of the most revered characters on primetime television, but he's done some pretty awful things. Here are the worst.
