LOS ANGELES – NOVEMBER 4: "Faith"–Gibbs (Mark Harmon, left) tries to figure out what's behind his father's (special guest star Ralph Waite, right) recent change in behavior while he investigates the death of a reverend's enlisted son, on NCIS, Tuesday Dec. 15 (8:00-9:00PM, ET/PT) on the CBS Television Network. (Photo by Cliff Lipson/CBS via Getty Images)