NCIS cast: Actress joins show as new recurring character Thu Mar 11, 2021 at 4:02pm ET The NCIS cast is getting a new actress in Season 18. Pic credit: CBS The NCIS cast is adding another actress to its Season 18 episodes. Following the exit of Maria Bello and her character, Jack Sloane, there was a spot on the show to add someone new. It was just revealed that the spot will be filled by actress Katrina Law, who CBS viewers may already know from her time on Hawaii Five-0. We will try hard to look past the coincidence that someone new to the NCIS cast appeared on a show in Hawaii right before a new NCIS spin-off will take place in Hawaii. But maybe it’s not a coincidence at all. Maybe this is a backdoor pilot.