Geoffrey Baer tackles three questions about Chicago's beloved rapid transit system, including the various spellings of the system, in this encore edition of Ask Geoffrey.

Geoffrey Baer visits a retro motel in River North, a towering turtle on the Near West Side and a vanishing South Side lake in this week's encore edition of Ask Geoffrey.

Chicago women had a professional baseball league of their own in the 1940s and '50s. Geoffrey Baer has the story of the National Girls Baseball League.

Geoffrey Baer visits 10 American towns in the final installment of the "10 That Changed America" series, airing at 8 p.m. Tuesday night on WTTW.

In this edition of Ask Geoffrey, our local history expert Geoffrey Baer hits the streets to answer road-related questions such as, Why are there so many angled streets running northwest in Chicago? And, What exactly does Division Street divide? And, Where is Beethoven Place?

The second installment of WTTW's "10 That Changed America" premiers Tuesday. This time, host Geoffrey Baer looks at 10 American parks that changed how we live and play in our cities.

Chicago's own Marina City is featured as one of 10 American homes in a new PBS series hosted by Geoffrey Baer that premieres tonight.

For decades, a cocktail called the Downscope was served up at Skipper’s Marina on the Calumet River. Its recipe was a closely guarded secret, until now. Geoffrey Baer tells us what's up with the Downscope and answers other viewer questions on this edition of Ask Geoffrey.

In the 1940s, a theater in the Loop was providing nightly news updates, and a professional cyclist was cleaning up with his Chicago chain of dry cleaning stores. Geoffrey Baer raises the curtain on these local history stories.

Hear what viewers had to say about Chicago Public Schools’ mariachi music program, Geoffrey Baer’s tour of Chicago’s rapid transit system and Ald. Ed Burke’s workers’ compensation program when we read feedback from the "Chicago Tonight" website, and our Facebook and Twitter pages.

Geoffrey Baer tackles three questions about Chicago's beloved rapid transit system, including the various spellings of the system, old downtown entrances between elevated stations and Loop stores and a mysterious tunnel a viewer spotted while riding the Blue Line.

An African-American movie studio in Logan Square made silent films that got people talking, but for all the wrong reasons. Geoffrey Baer shares the story of Ebony Films and more from Chicago's past in this week's edition of Ask Geoffrey.

A famous photo taken in 1940s Bronzeville features the faces of five young African-American men, but their identities have remained a mystery for generations. Local history expert Geoffrey Baer is here with the story behind one of Bronzeville's most enduring images in this encore edition of Ask Geoffrey.

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's most famous mayor might have a 50-foot Picasso in a plaza named for him, but a statue of Richard J. Daley resides in Springfield. Geoffrey Baer explains why Hizzoner is honored outside of Chicago in this week's edition of Ask Geoffrey. 

Geoffrey Baer investigates the history of Asylum Place, the explosive story behind a 1930s death caused by a manhole cover and what happened to magical Chicago restaurant chain.