A nature exhibit, a World's Fair Show and an iconic musical; Chicago Tonight knows what’s going on this weekend.

One of the most famous home runs in baseball history is also one of the most controversial. In the 1932 World Series between the Cubs and the Yankees, Babe Ruth came to bat with the score tied. As Cubs players and fans taunted him, Ruth is said to have pointed to centerfield and then hit a 500-foot home run to that very spot. Did he call his shot? If not, how did the story get going? Chicago sportswriter Ed Sherman has written a new book on the legendary baseball moment. He joins us. Read an interview with Sherman, an excerpt from the book, and watch a Chicago Stories episode about "The Called Shot."

Geoffrey Baer's newest program -- A Taste for the Past: Architect Pier Carlo Bontempi -- is a profile of a little-known Italian architect who is this year's winner of the Driehaus Prize, a prestigious, Chicago-based award for architects who design classical and traditional buildings. It debuts on WTTW11 at 8:00 pm Thursday. Geoffrey joins us to tell us about his adventures in Italy. Watch an anecdote from Bontempi's childhood, read an interview with the documentary's producer and co-writer, and see behind-the-scenes photos from Ialy.

We preview the surprisingly varied work of American artist John Singer Sargent through The Art Institute of Chicago’s permanent collection. Known as the great American portrait artist, Sargent was a prodigy whose many talents extended beyond his reputation. View a slideshow of Sargent's artwork.

The Chicago River has long been thought of as Chicago’s second shoreline, overlooked by Lake Michigan. In Chicago’s River At Work And At Play, author Neal Samors and photographer Steven Dahlman explore the history and future of the Chicago River. Read an interview with Samors, view a slideshow, and read the preface of the book, written by former Mayor Richard M. Daley.

Vietnam veteran Lon Hodge struggled for years with Post Traumatic Stress Disorder until he got a PTSD service dog named Gander. Lon says that Gander has saved his life. Now, Lon and Gander help other vets and work to raise awareness about PTSD, veteran suicide and service dogs. We revisit Jay Shefsky's profile. Read an interview with Fran Menley, Service Dog Trainer at Freedom Service Dogs of America, about how they rescue, train and pair dogs with veterans and people with disabilities.

Hollywood photographer Peter Sorel was born in Hungary, but now calls Chicago home. From One Flew Over the Cuckoo’s Nest to Frida and Life of Pi, Sorel has documented and created poster images for more than 120 memorable movies. Read an article and view a slideshow of Sorel's work.

Geoffrey Baer sheds some light on a colorful Chicago firehouse tradition that has a maritime connection, the real life Mr. Selfridge’s time in Chicago and the location of the city’s first revolving doors this week's edition of Ask Geoffrey.

Chicago Sun-Times Theater Critic Hedy Weiss reviews plays currently on Chicago area stages. Watch web extra video reviews.

The dean of Chicago photojournalists, Art Shay, shares pictures of his beloved wife Florence, who died in 2012 after 67 years of marriage. We revisit a preview of the exhibit, My Florence: Photographs by Art Shay. Read an interview with Ann Nathan, a gallery owner who currently represents Shay.

This past weekend, at the Paralympic Games in Sochi, the U.S. sled hockey team won the Gold Medal. Two members of that team -- Brody Roybal and Kevin McKee -- were from Chicago and were featured in Jay Shefsky's profile. Watch the video and read an article.

Malachy Towey and Kevin Henry are two of the elder statesman of Irish music in Chicago. Towey, age 93, plays the bodhrán, an Irish frame drum. Henry is 85, and plays the flute. For more than 50 years, they have been part of a vibrant Irish music scene in Chicago.

We get a behind-the-scenes look at the process and history of dyeing the Chicago River green – a city tradition since 1962, and a family tradition since its inception. Meet the men who turn the river bright green each year in this story originally told by John Callaway on March 17, 2004.

New at the museum -- two solo exhibitions feature a pair of female contemporary Indian artists.

As spring in Chicago gets underway, so do the building projects. We talk with Chicago Tribune’s Pulitzer Prize-winning architecture critic Blair Kamin about the most recent building projects in the news and what will be coming down the pipeline. Read an article.

It’s funny the way Chicago anecdotes bloom in books about Broadway.