Patti LuPone, star of “Evita” and “Gypsy,” returns to Broadway with her longtime friend Mia Farrow in a new play, “The Roommate,” which explores the strength, depth, humor and surprise found in women of a certain age . Correspondent Seth Doane talks to LuPone about the power of women with experience and about an actor’s longevity; and with Farrow about how she views her career, from the 13 films she made with director Woody Allen, to what she sees as the best part she’s ever been offered.