GREY’S ANATOMY - "Life on Mars?" - A wealthy inventor arrives at Grey Sloan and asks Koracick for help, while Meredith struggles to save a woman with diabetes who has been rationing her insulin. Jo and Link fight to save a young man who fell onto train tracks, and Jackson and Vic's relationship hits a snag, on an all-new episode of "Grey's Anatomy," THURSDAY, MARCH 12 (9:00-10:01 p.m. EDT), on ABC. (ABC/Christopher Willard)KEVIN MCKIDD, CATERINA SCORSONE

GREY'S ANATOMY - "Whistlin' Past the Graveyard" - Alex is hoping to impress investors at Pac-Gen North, but when he hears disturbing news about skeletons on the construction site grounds, he enlists Richard to help with distraction tactics. Teddy feels the pressure to be super-mom after tasking herself with creating original Halloween costumes for Allison and Leo, while Meredith fears she won't make it home in time for trick-or-treating with her kids. Elsewhere, Jackson tends to a pediatric patient who is upset she is spending her Halloween in a hospital on "Grey's Anatomy," THURSDAY, OCT. 31 (8:00-9:01 p.m. EDT), on ABC. (ABC/Kelsey McNeal)CAMILLA LUDDINGTON