Two new midseason shows got off to strong starts Tuesday night. CBS's Supreme Court drama First Monday averaged 15 million viewers to finish No. 1 at 9 pm. ABC's debut of The Chair, meanwhile, was tops at 8 pm among adults 18-49 — tying with CBS's resurgent JAG. The John McEnroe-hosted quizzer improved on the network's performance in that time period this season by 43 percent. In related news, the New York Post reports that a contestant on Fox's rival game show, The Chamber, suffered minor burns after spending several minutes inside the show's mechanical contraption. Fox is dismissing the story as a rumor.