In a plan to boost NBC’s late-night ratings, Jay Leno would go back to his 11:35 time slot, while Conan O’Brien, who replaced Leno last year, will move to 12:05. TMZ first reported the Leno development earlier today, with the New York Times clearing up O’Brien’s destination. “We remain committed to keeping Conan O’Brien on NBC,” a source says, adding that O’Brien’s show will remain an hour long. (More Jay Leno stories.)