A toxic algae bloom in Lake Erie put Toledo's drinking water in jeopardy. Could the same thing happen to Lake Michigan and Chicago's water supply? Paris Schutz has the latest.

The largest Ebola virus outbreak in history is plaguing the western coast of Africa as one American doctor returns home for treatment. With more than 4,000 infected, international organizations are stepping up their response and aid to the affected countries.

Community groups in Little Village organize to prevent violence in a neighborhood that sits on the border between two warring gang factions. 

As the Tribune Company spins off its newspaper assets, we talk to Lynne Marek of Crain's Chicago Business about the prospects for Tribune Publishing and its stable of newspapers going forward.

A local professor has co-created a computer program that calculates age from a selfie. We talk about the development, process, and accuracy of the project FaceMyAge. 

We share what you had to say about our story on Bitcoin expansion in Chicago when read some of our viewer feedback. 

40^th Ward Alderman Pat O’Connor, the mayor’s City Council floor leader, lashed out today at claims that he passed a bill trying to weaken the city council watchdog’s power to police campaign finance. And he says the timing of the bill, first reported by Chicago Tonight, is not connected to a recently opened probe into possible campaign finance violations O’Connor may have committed. 

Chicago Police Superintendent Garry McCarthy says that he believes there is no indication that the department is ‘faking crime stats’ in an effort to artificially give off the perception that crime is lower than it is.

A healthy living fest, Bears practice under the lights, and a free ABBA-inspired concert; Chicago Tonight knows what’s going on this weekend.

Joel Weisman and his panel of journalists discuss this week's headlines.

Joel Weisman and his panel of journalists discuss Mayor Rahm Emanuel’s initiative to temporarily house 1,000 immigrant children. 

City officials aren’t the only ones trying to make a dent in Chicago’s violence. There are heroes and heroines throughout Chicago’s neighborhoods providing positive alternatives for youth in an effort to help reduce the violence that plagues the city. We’ll meet some of those community activists who are trying to make a difference.

The computer Watson, best known for winning a $1 million prize on the quiz show "Jeopardy!," is now using the vast power of its artificial intelligence for everything from medical diagnostics to creating new cooking recipes. We talk to Chicagoan Stephen Gold, vice president at IBM's Watson group, about what Watson has in store for us.

Sean Graney, founder of The Hypocrites, works to wrap up rehearsals on "All Our Tragic," his lengthy adaptation of every extant Greek tragedy.

The big studio blockbusters fizzled at the box office this summer. We look at the films that got people talking and put people into theater seats. We also look ahead to the highly anticipated fall films.