Twenty-something Leo (Teddy Spencer) shows up at the door of his grandmother's (Dee Maaske) New York apartment at 3 in the morning after a cross-country bicycle trip for an unexpected, extended visit. Family dynamics and history, new-left vs. traditional communist politics, aging and grief form the terrain they traverse in this critically acclaimed play by Amy Herzog. W 7pm; Th, F, Sa 8pm; Su 2pm. Through 4/13. $24-$36. Capital Stage, 2215 J St.; (916) 995-5464; www.capstage.org. K.M.