When the modern dancer Martha Graham (1894–1991) was young, her father, a doctor, put a drop of water on a slide and asked her what she saw. “Pure water,” she answered. He then put the slide under a microscope and had her look. “There are wiggles in it,” Martha exclaimed. Dr. Graham said, “Yes, it is impure. Just remember this all of your life, Martha. You must look for the truth.” And that is what she did, in dances that dig down into those caverns measureless to man—the psyche and the soul. “Movement never lies,” Graham always said, again quoting her father. No surprise, then, that actors clamored to her classes, stars such as Bette Davis, Kirk Douglas, Gregory Peck, Joanne Woodward, Paul Newman, and Liza Minnelli. Now in the second season of its three-year centennial celebration, the company moves from last season’s focus on Graham’s Americana masterpieces of the 1930s into her electrifying psychological breakthroughs of the 1940s and 50s: Cave of the Heart (1946), Errand into the Maze (1947), Immediate Tragedy (1937), Appalachian Spring (1944), and Dark Meadow Suite (1946). These classics will be presented in dialogue with more recent works by Jamar Roberts and Hofesh Shechter. Later in the season the ferocious Clytemnestra, Act 2 comes into repertory. The dances of Graham have not dated, and you cannot count yourself cultured until you’ve come to know her work. Check the company Web site for tour cities and dates. —Laura Jacobs