SHOW: COLOR ADJUSTMENT
TIME: JUNE 15, 10 P.M., PBS
THE BOTTOM LINE: A provocative look at how TV has portrayed blacks, from Amos 'n' Andy through Roots to Cosby.
Marlon Riggs may be the most notorious unknown filmmaker in America. A lecturer at the University of California's Graduate School of Journalism in Berkeley, he was the producer of Tongues Untied, a film about black homosexuals that aired on pbs last summer and became a cause celebre after being attacked by conservatives for its "offensive" material. The film -- an offbeat, heartfelt mix of documentary, poetry and performance art -- did not...