For those TV fans who want some new Halloween content, Tracker, Shifting Gears and NCIS are just some of the shows delivering tricks - and treats - this year. CBS has several Halloween-themed episodes planned with Ghosts, NCIS, Elsbeth and Tracker. Us Weekly had the exclusive first look at Elsbeth's themed episode, which showed Carrie Preston's title character going head to head with Sharon (Annaleigh Ashford), who is described as a murderous suburban housewife.