CCA Cinematheque 11 a.m. Sunday, Oct. 10: Marcia Muth: Memory Painter. Director Diane Armitage in person. No charge. 6 p.m. Thursday, Oct. 14: William Kentridge: Anything Is Possible. The Lensic Performing Arts Center 11 a.m. Saturday, Oct. 9: An HD broadcast from the Metropolitan Opera of Wagner’s Das Rheingold (6 p.m. encore screening). 7 p.m. Thursday, Oct. 14: An HD broadcast of A Disappearing Number, presented by London’s National Theatre.