Horton Foote, With More to Say Sara Krulwich/The New York Times Betty Buckley, left, and Hallie Foote in "The Old Friends," at Signature. Horton Foote, the great American playwright who made moving drama and heartfelt comedy from close examination of small-town life, died in 2009. But the Signature Theater, which presented many of Foote's plays over the years, has unearthed a previously unseen play, "The Old Friends," and is producing it this fall with a terrific cast, including Foote's daughter Hallie Foote, Betty Buckley, Veanne Cox, Cotter Smith and Lois Smith. Ms. Smith, so remarkably good in the Signature's revival of Foote's "Trip to Bountiful," plays Mamie Borden, the matriarch of a Texas farming family who is awaiting a visit from her son and his wife. The unexpected news that comes with the visit gives rise to conflicts that resurrect ghosts from the past and entangle several generations of two families. Michael Wilson, who directed the Signature's production of Foote's "Orphans" Home Cycle," is once again at the helm. Opens Thursday, the Irene Diamond Stage of the Signature Center, 480 West 42nd Street, Clinton, 212-244-7529, signaturetheatre.org.