Tony winner Robert Falls (Desire Under the Elms, Death of a Salesman) directs the two-person drama about former Peace Corps members who sell out for corporate ambitions. Performances will continue through July 24.

Tierney ("ER," Some Girl (s)) and Weber ("Wings," "Brothers and Sisters") star as husband and wife, Ken and Barbara Hoyle.

Here's how Williamstown describes the play: "Ken Hoyle is an ambitious hatchet man for a multinational company that sells defective baby formula in developing African countries. His wife Barbara advises other young executive wives on life in the third world. Their days as idealistic Peace Corps volunteers are far behind them – physically and metaphorically — and the succession of moral compromises has taken its toll. Jon Robin Baitz weaves a timely tale of corporate misdeeds, personal tragedy, and marital discord that takes us into the private thoughts of a man and a woman searching for answers and aching for redemption."

Designing Three Hotels are Thomas Lynch (scenic design), Susan Hilferty (costume design), James F. Ingalls (lighting design) and Obediah Eaves (sound design and composer).

Baitz's plays include The Paris Letter, Ten Unknowns, Mizlansky/Zilinsky or Schmucks, A Fair Country, The Film Society, The Substance of Fire and The End of the Day. He has also written the screenplays for "The Substance of Fire" and "People I Know" as well as for TV's "Brothers & Sisters" (which he created), "The West Wing" and "Alias." His most recent play, Other Desert Cities, was seen Off-Broadway last spring at Lincoln Center Theater and will arrive on Broadway this fall. For tickets visit WilliamstownTheatreFestival.