Geoffrey Baer peeks into a Wrigley Field teepee and goes under the dome at Preston Bradley Hall in this week’s Ask Geoffrey.

We revisit our conversation with Chicago’s master of the mandolin. Don Stiernberg joins us to talk about playing a traditional instrument in a modern way – and performs in studio with his trio.

On Tuesday, Aug. 12, Lauren Bacall, 89, died in New York City. The legendary actress began a film career in the 1940s and continued to act for nearly 70 years. We revisit a conversation she had with former Chicago Tonight host John Callaway.

Chicago native, comedian and Oscar-winning actor Robin Williams died at the age of 63. We take a look back at his life and career. 

In the wake of Robin Williams's death, apparently from suicide, we discuss depression with an expert in mental illness.

Are aldermen trying to operate without any oversight? We'll talk to the outspoken legislative inspector general about why he feels he needs more money to do his job.

A young scientist works to repair the world, one school bus at a time. Brandis Friedman has his story. 

What's behind some candidates seeming personality transplants? We talk to three of Chicago's top media trainers who give us the insight behind good, bad, and ugly messaging.

Jaume Plensa's sculptures featuring giant heads opened to the public this summer in Chicago's Millennium Park. We revisit our talk with the Catalan Spanish artist and sculptor on his inspiration behind his latest installation.

In Swahili, Kusanya means to collect and gather the people and strengths within the community to build a stronger, more hopeful, and more peaceful neighborhood. Kusanya is also a café in Englewood which has embarked on a journey of bringing hope and love to the community. 

Carol Marin and four political journalists analyze where the candidates stand in the latest polls, and how money is influencing the hotly contested races.

We sit down with experts to check in on the crisis in Iraq.

The Metropolitan Water Reclamation District of Greater Chicago is taking the residue of human waste from their water filtration process and transforming into a powerful soil additive/fertilizer that is used in parks, golf courses, and farms throughout the area.

Chief meteorologist at WGN Tom Skilling co-authored an op-ed in the Chicago Tribune regarding climate change and the potential effects of inaction. We discuss the issue with him tonight. 

Shark Week is back. We discuss our continuing fascination with the ocean's top predator with shark expert Lise Watson of the Shedd Aquarium.