Could you help me find this movie or series?

It´s about a girl that works in a tv show for children, and she is in charge of an animatronic tall doll, after the show is recorded, she keep the doll in the usual place, but i think that they offered a better job or something and the doll is jealous and kill the people around her, i just remeber this, it was a chapter of a mini series, i´m almost sure,please help.