Arena Stage's Molly Smith sets her production of Rodgers and Hammerstein's great American musical Oklahoma! in the robust world of territory life filled with a dynamic cast as rich and complex as the great tapestry of America itself. "Oh, What A Beautiful Mornin'," "People Will Say We're In Love" and of course the title tune are all on tap in this ode to America's pioneer spirit, the first to christen Arena State's sparkling new complex. To Dec. 26. The Fichlander at Mead Center for American Theater, 1101 6th St. SW. Tickets are $75 to $105. Call 202-488-3300 or visit arenastage.org.