A&E has renewed nonfiction skein “Intervention” for a sixth season.The reality hour, in which substance abusers are confronted by loved ones in the hope of getting them treatment, is A&E’s top-rated series. Season five averaged 2 million total viewers, up 33% over the previous year. In adults 18-49, “Intervention” averaged 1.5 million viewers, an increase of 50% 2007 figure by 50%. Positive feedback for the series led A&E to launch the Recovery Project, a nonprofit social initiative that raises awareness of addiction and recovery issues. “Intervention,” from production shingle GRB, is exec produced by Sam Mettler, Dan Partland, Robert Sharenow and Colleen Conway.