This week on Chicago Tonight: The Week in Review, aldermanic runoff candidates make their final push for City Council, while Rahm Emanuel asks if the number of aldermen should be cut in half. Gas prices soar, with experts wondering if $5 a gallon is just around the corner. The University of Illinois approves another tuition hike. Groupon's president surprises the business community and calls it quits. And in sports, Derrick Rose makes his case for MVP while the Chicago Bulls continue to surge.