Shared Experience Theatre Company's "Mill on the Floss," at the Kennedy Center, is a thrilling adaptation of George Eliot's 1860 novel -- a powerful, sweeping story, masterfully told. Shared Experience is renowned for its physical approach to theater, and the production sure has energy; it's like a constantly flexing muscle. But it's also ferociously smart, as befits Eliot's saga. It explores the mind of its heroine, Maggie Tulliver, by having three actresses play the character at different ages. Pauline Turner is the youngest Maggie, sweet but headstrong and impetuous. Turner stomps in huge c...