Ralph Waite as Jackson Gibbs
On NCIS: Jackson Gibbs has the very special role of Leroy Jethro Gibbs' father. While the two don't always see eye-to-eye, they work hard to reconcile their differences, as seen in "Silent Night."
Where you may have seen him on CBS: Ralph plays Sheriff Montgomery on CSI.
Watch as Gibbs grapples with the news in "Honor Thy Father" on CBS All Access.