“Grangeville” has been extended from Friday, Sept. 4, through Monday, Sept. 21, at the Ruskin Group Theatre. MacArthur “Genius” Samuel D. Hunter explores the often-imperfect act of forgiveness in his multi-award nominated play. Two brothers – one living in rural Grangeville, Idaho, the other in Amsterdam – reconnect through a series of conversations as they grapple with serious life decisions. What begins as a practical discussion slowly unearths long-buried tensions. Showtimes are at 8 p.m., Saturday; 2 p.m. Sunday; with added shows at 8 p.m. on Sept. 4 and Sept. 21. Tickets start at $40. 2800 Airport Ave., Santa Monica. (310)397-3244, ruskingrouptheatre.com.