Comedian Tracey Ullman tells Hari Sreenivasan why she’s having the time of her life impersonating all kinds of characters on her variety show, from Angela Merkel to Theresa May.

The European Union’s foreign policy chief Federica Mogherini joins the program and says the rest of the nuclear deal signatories are trying their best to salvage it.

Walter Isaacson interviews award-winning historian and filmmaker Ken Burns about his new documentary on the Mayo Clinic.

As world leaders descend on New York ahead of the U.N. General Assembly, Christiane Amanpour sits down with Nelson Mandela’s widow, Graca Machel, to remember the great lessons in leadership from her late husband.

Christiane Amanpour sits down with Robert Redford and looks through the extraordinary range of quintessentially American roles the legendary actor has embraced.

Michel Martin interviews author Robin DiAngelo, author of “White Fragility,” to talk about what she recognized as her own unconscious bias.

Comedian W. Kamau Bell heads to Kenya with travel companion, Anthony Bourdain, and as an African-American, sees Africa for the first time. He joins the program to discuss that trip, and how as host of “United Shades of America,” he tries to heal the cultural and racial divide across the country.

In Zimbabwe, the ruthless dictator Robert Mugabe was finally ousted, only to be replaced by his former vice president. Christiane Amanpour sits down with Zimbabwean President Emmerson Mnangagwa and asks whether he can turn this brutalized country around.

Former Senator Barbara Boxer calls Republican senators who interrogated Anita Hill back in 1991 “torturers.” Now some of those same senators are revving up to take on Dr. Christine Blasey Ford. She joins the program to discuss whether history is repeating itself.

U.S. presidential historian and Pulitzer Prize-winning author Doris Kearns Goodwin joins the program to discuss her timely new book, “Leadership: In Turbulent Times,” comparing our current political moment with the highs and lows of the past.

Hari Sreenivasan sits down with Mount Sinai’s Dr. Prabhjot Singh to discuss the United States’ broken healthcare system and how to fix it.

Haifaa al-Mansour is the best-known movie director from Saudia Arabia, a country where both women, and film, are notoriously restricted. She sits down with Christiane to discuss the global impact and success of her work.

Anand Giridharadas believes we should be a bit more skeptical about embracing billionaires as the change-makers of our era. He joins the program to discuss his new book.

As Republicans face-off with the woman accusing Supreme Court nominee Brett Kavanaugh of assault in the 1980s, former federal prosecutor Laura Coates joins the program to discuss why this could be a decisive moment for the #MeToo revolution.

Novelist Khaled Hosseini discusses his illustrated tribute to the refugees who risk everything for a better life.

As President Trump’s hope to broker peace in the Middle East fades, Christiane Amanpour is joined by the U.N. Secretary General António Gutteres in an exclusive interview.

Alicia Menendez interviews Pulitzer Prize-winning journalist Jose Antonio Vargas, known for his blockbuster New York Times essay, “My Life as an Undocumented Immigrant.”

As the #MeToo movement reaches the highest court in America, Oscar-winning actress Sally Field shares her own history of abuse.

As the Trump administration turns foreign policy on its head, leaders across the world are wondering whether our international institutions can survive. Veteran diplomat William Burns joins the program.

Walter Isaacson interviews the former Chief Security Officer of Facebook, Alex Stamos, about Russia’s attack on America’s 2016 election.