Like many of her castmates on “Lost” (ABC, 2005- ), Maggie Grace’s acting career received a considerable boost after signing on to the complex science fiction drama. Prior to it, she had logged numerous hours on network series like “Oliver Beene” (Fox, 2003-2004) and several TV-movies, but remained largely anonymous to viewers until “Lost.” Cast as Shannon Rutherford, a spoiled rich girl who showed an inordinate amount of character under duress, Grace tucked into her showy part with relish, and found herself on the receiving end of glowing praise from the press, with several men’s magazines