Until a few years ago, Hollywood seldom set up cameras north of Boston. But that changed after the state began offering a tax credit that allows producers to recoup millions in rebates, a move that has lured major stars such as Larry David and Jon Hamm to shoot in the region.

Actors Jon Hamm, left, and Larry David talk prior to a baseball game between the New York Yankees and the Boston Red Sox, Thursday, Sept. 13, 2012 at Fenway Park in Boston.