This year's Williamstown Theatre Festival features the U.S. premiere of Rick Elice and Roger Rees' Double Double, which is also directed by Roger Rees. Double Double is a glossy romantic thriller about a widow, Phillipa James, who picks up a bum from London's Embankment and takes him home to her late husband's luxury flat. A purely business arrangement, as she explains to the down-and-out Duncan McFee, who happens to bear an uncanny resemblance to her dearly departed mate. In exchange for just a tad of impersonation, and the signing of some legal papers, Phillipa offers Duncan money, food and shelter. That's the deal. But it's far from the whole truth.