Winter and early spring are a great time to catch a Broadway show. Revivals include Henrik Ibsen’s “A Doll’s House” starring Jessica Chastain, Stephen Sondheim’s “Sweeney Todd,” Bob Fosse’s “Dancin’” and Lerner and Loewe’s “Camelot.” Anticipated Broadway premieres are “Summer, 1976” starring Laura Linney, “Life of Pi” based on the book and play, and Pulitzer Prize-winning, off-Broadway hit “Fat Ham.” Various locations.