The 1950s have a reputation for golly-gee innocence and consumerism gone wild. But the era had its dark moments, too, especially during the House Un-American Activities Committee witch hunts, which rocked Hollywood during Sen. Joe McCarthy's infamous reign. Emory University offers a crash course in the age's films and politics with two movies associated with the Hollywood blacklist. Leo McCarey's MY SON JOHN (1952), showing tonight, FEB. 4, stars Helen Hayes and Dean Jagger as concerned parents fretting over their son's communist leanings. On Tues., FEB. 5, it's the enduring and poignant working-man's lament ON THE WATERFRONT (1954), starring Marlon Brando and directed by Elia Kazan, a "friendly witness" during the HUAC trials. Harvey Klehr, author of Espionage, Informing and the Movies: Hollywood's Communist Problem and professor of politics and history at Emory, uses the two films to discuss Reds in the movies on Wed., FEB. 6. Free. Screenings and lecture: 8 p.m. White Hall, Room 205. 404-727-6257. www.arts.emory.edu.