The Hitchcock classic Notorious turns 70 this year — and CIA’s Cinematheque celebrates by screening it in its original 35mm glory. The plot is centered on a love triangle between an American government agent, the leader of a Nazi organization centered in Brazil, and the daughter of a convicted Nazi spy. When the agent (Carey Grant) must convince the girl (Ingrid Bergman) to seduce the Nazi (Claude Rains) as part of an espionage operation, things get messy. The film plays today at 5 p.m. and again Sunday at 6:30. Tickets are $10, $7 for Cinematheque members, those with a Cleveland Institute of Art or Cleveland State University I.D., and those age 25 and under. (Shively)