New Line Television executives have slated off-net runs of “The Twilight Zone” to debut the week of Sept. 6. The series is now cleared on stations in 96 percent of the country, including New York’s WPIX-TV, Los Angeles’ KCAL-TV/KCBS-TV, Chicago’s WGN-TV and XWGN-TV, and Philadelphia’s WPHL-TV. Several markets will air a Labor Day marathon featuring four episodes of the series.