The Eisenhower Expressway runs underneath the Old Main Post Office, causing one viewer to wonder which came first. Geoffrey Baer delves into the history of these interlinked landmarks and answers other viewer questions in this week’s edition of Ask Geoffrey.

Chicago may be home to many Fortune 500 companies, but are corporate headquarters here shrinking? We get the latest from Crain's Chicago Business.

The new, original PBS show “Mercy Street” is a sprawling Civil War drama set in a hotel in Alexandria, Virgina that has been commandeered by the Union Army as a hospital. The six-episode series blends fiction with historical settings in a town where Confederate and Union soldiers mingled with a slaves and free people. We talk with two of the show's producers. 

A decision this week by a federal judge could green-light plans for the Lucas Museum of Narrative Art, the futuristic-looking proposal from film mogul George Lucas currently facing a lawsuit over its proposed lakefront location.

Watch the the February 2, 2016 episode of Chicago Tonight.

Just a day after the Chicago Teachers Union rejected the school board's latest contract offer, Chicago Public Schools is announcing cuts. CEO Forrest Claypool says the district is still working to avoid teacher layoffs, but some staffers will lose their jobs in order for the district to save money.

The Chicago Teachers Union is fighting mad and pursuing legal action to strike immediately. We get the latest from CTU vice president Jesse Sharkey.

On Monday, the World Health Organization declared the Zika virus an international public health emergency. Dr. Allison Arwady, chief medical officer of the Chicago Department of Public Health, joins us to discuss the virus and the risk it poses to Chicago jet-setters.

The cost of Illinois’ budget impasse? The income tax would have to go up 100 percent if the state’s debt is to be paid off through revenue alone, according to state Comptroller Leslie Munger. How much longer can the state teeter along without a budget? Paris Schutz has more.

Michigan Gov. Rick Synder is facing calls to resign over his administration's bungled handling of the contaminated water crisis in Flint. A former high-ranking official at the Environmental Protection Agency tells us what she thinks went wrong.

A yearlong international arts festival underway in Chicago celebrates the legacy of William Shakespeare and commemorates the 400 years since his death. Barbara Gaines of Chicago Shakespeare Theater and Anthony Freud of Lyric Opera Chicago join us to discuss the festival and the Bard’s legacy.

Watch the February 1, 2016 full episode of Chicago Tonight.

White House hopefuls are getting their first test with voters tonight in Iowa, where caucusing is in full swing. Joining us from Des Moines, Iowa to talk about that and more is "Chicago Tonight's" Carol Marin.

Members of the Chicago Teachers Union bargaining unit say they spent hours and hours considering the school board's "serious" contract offer. But on Monday, the group announced that they could not accept it.

A recent Chicago Tribune investigation revealed that just 1 percent of Chicago police officers are responsible for almost a third of all misconduct lawsuits. Joining “Chicago Tonight” to discuss what it will take to hold police officers truly accountable are Lori Lightfoot and Sergio Acosta.