Narrator Rocky Carroll on special crime series

Real-life NCIS agents reveal their investigation into the deaths of two Navy Petty officers found in a Virginia Beach apartment and the decade-long search for answers in “The Double Cross,” the series premiere of “48 Hours: NCIS,” airing Tuesday at 10/9c on CBS. Actor Rocky Carroll of CBS’ “NCIS” narrates the series and visited “CBS This Morning” for a preview.