Nilka Martell and her neighbors—untrained, uncredentialed—revived the Bronx River and are taking on the hideous Cross Bronx Expressway. “We’re just a group of Bronxites that have these ambitious ideas, and we’re just going to figure it out.” Presented with the Architectural League, in conjunction with the exhibition Cross Bronx/Living Legend at the Bronx River Art Center.

Luca Vignelli reflects on his parents, Massimo and Lella Vignelli—legendary designers who created everything from furniture to typefaces, including the bold 1972 New York City subway map. Though initially hated and quickly withdrawn, the MTA has now revived the map, slightly revised, offering rare good news in tough times. “It was a diagram, not a map,” Luca explains. Speaking from Nerano, Italy, he shares insights into their legacy, their philosophy, and why they never saw themselves as artists.

Janis Siegel, a member of Manhattan Transfer, has won ten Grammy Awards, but “I was not going to be a singer at all, actually; I was going to be a nurse.” Medicine’s loss, music’s gain. Siegel tells us about Pips Comedy Club and Tim Hauser.

Jamie Bernstein’s father, Leonard Bernstein, almost thought “that if he could write a good enough song, maybe he could stop war.” Not mad, aspiring. “It’s ridiculously idealistic, but that was his impetus.” Tales of a famous father. Bernstein tells us all about her father’s music!

Actor Charles Busch says, “My life was a bit like the plot of Auntie Mame.” Busch has stories about Linda Lavin, Christopher Isherwood, Lily Tomlin, Angela Landsbury, Vivien Leigh, Marlene Dietrich, and tells us about Gritti Palace, Venice. Plus, he sings.

In addition to being a much admired writer, Ann Patchett owns Parnassus Books in Nashville. “Because I own a bookstore, I get a copy of just about every book that comes out. It’s like being pelted to death with books,” she says. Patchett tells us about Meg Mason, her bookstore, and her father’s watch.

Colum McCann is the “New York Times” bestselling author of “Let the Great World Spin.” His new novel, “Twist,” tells a propulsive story of rupture and repair in the digital age, delving into a hidden world deep under the ocean.

We’ll speak with theatre director Ivo van Hove. van Hove has directed “A View from the Bridge,” “West Side Story” on Broadway, and “Lazarus,” David Bowie’s final project.

Host Randy Cohen will speak with Jonathan Capehart, a member of The Washington Post editorial board, commentator on The PBS NewsHour, anchor of The Weekend on MSNBC, and author of Yet Here I Am. Capehart seems liberal in his politics, conservative in his dress. “Absolutely. I love a good wild outfit, on someone else," he says.

When drummer Bobby Sanabria was a kid, his father introduced him to an array of music, from Tito Puente to Dobie Gray. “He bought himself a La-Z-Boy chair. He would sit there after dinner, smoke a cigarette, and zone out listening to music.” Bad for the lungs, great for the soul. The making of a musician. Presented with the Bronx Music Hall.