Playwright Jon Rabin Baitz (far left) joins his very known cast at the March 8 opening of his Ten Unknowns at Lincoln Center. Among the stars are (left to right) Julianna Margulies, Donald Sutherland, Denis O'Hare and Justin Kirk. In Ten Unknowns, Sutherland — sporting a mane of white hair and a beard — plays Malcolm, a once promising painter who once haunted post-war New York. He now lives in Mexico, where he fled three decades before to escape the hegemony of the Abstract Expressionists (Malcolm is a figurative artist). But with the help of slacker art student Kirk, Malcolm has mysteriously begun producing some of the best paintings of his career, causing dealer O'Hare to see dollars in a Manhattan retrospective of the old man's work.