At the heart of the impeachment inquiry is Ukraine, and today’s testimony brought into sharp relief the challenges that country faces both militarily and over corruption. To understand what’s at stake for Ukraine and why it is vital to US foreign policy interests, Anthony Gardner joins the program in London.

In today’s hearings, there was talk of President Trump trying to publicly box in President Zelensky, involving a planned TV interview where the Ukrainian leader was to publicly announce investigations into the Bidens and alleged Ukrainian meddling in 2016. To provide perspective on these tactics, Christiane speaks with veteran journalist Jeff Greenfield and legendary reporter Carl Bernstein.

Garry Kasparov became the youngest world chess champion in history at the age of 22, while his famous matches against the IBM supercomputer Deep Blue brought chess and artificial intelligence into the mainstream. Now, he’s focusing on the quiet war Russia is waging against U.S. democracy. Kasparov sits down with Miles O’Brien to discuss everything from troll farms to election interference.

The impeachment inquiry is an inevitably political process, despite the non-partisan credentials of the witnesses scheduled this week. Joe Crowley was chair of the House Democratic Caucus until he lost his primary to Alexandria Ocasio Cortez, but remains close to House Speaker Nancy Pelosi. He joins the program in London to break down what we can expect politically from the coming hearings.

On Wednesday, the all-consuming political drama of impeachment goes public for the first time on Capitol Hill, with the chance to see testimony first-hand from various government officials – including Trump appointees – who have corroborated the original whistleblower complaint. Former Deputy CIA director John McLaughlin joins the program to discuss what's at stake.

In Israel today, many cities have closed schools and businesses as Palestinian militants fired missiles across the border. This comes as Israel languishes in a state of political confusion: after two inconclusive elections, Blue and White Party leader Benny Gantz is still trying to form a ruling coalition, after Prime Minister Netanyahu’s failed attempts. Yair Golan joins the program to discuss.

Ronan Farrow was at the forefront of the reporting that triggered the #MeToo movement, and shared a Pulitzer Prize for his efforts. Having helped expose allegations of sexual abuse by Hollywood mega-producer Harvey Weinstein, Farrow now goes further in his new book, “Catch and Kill.” He sits down with Michel to detail his painstaking investigations.

This week sees a new phase in the impeachment inquiry, as it goes public for the first time and American voters get their first opportunity to see unfiltered testimony from key witnesses. New York Times executive editor Dean Baquet joins the program in London to discuss the challenges of covering the Trump administration, as well as the criticisms his newspaper has faced in recent times.

Artist Antony Gormley's newest exhibition represents a significant milestone in his career, as he takes over the prestigious Royal Academy in London with a series of experimental installations. Few other artists would be allowed to flood one room with water and mud, or drill holes in a glass dome in another space—but Gormley was. He gives Christiane a hands-on look at his work.

30 years ago this weekend, the Berlin Wall fell. To assess this historic anniversary and its consequences, Christiane speaks with three people who witnessed history first hand: Christopher Mallaby was Britain’s Ambassador to West Germany when the Wall fell, while historian Timothy Garton Ash and Russian foreign policy expert Andrey Kortunov were both in Berlin that fateful night.

A new production in London’s West End offers a fresh interpretation of Arthur Miller's "Death of a Salesman": at the suggestion of Miller’s daughter Rebecca, the central Loman family is African American. Actor Wendell Pierce plays patriarch Willy Loman, and he joins Christiane to discuss his role and the significance of African American art.

”The Last Black Man in San Francisco” is a semi-autobiographical film following Jimmie Fails as he tries to regain his father’s house. It’s a passion project for its star—he and the director, Joe Talbot, first conceived of the film when they were just teenagers. Fails sits down with Hari to discuss how he feels now that it has turned out to be one of the best-reviewed films of the year.

The Westboro Baptist Church is known for picketing military funerals and its celebration of death and tragedy, even the 9/11 attacks. Megan Phelps-Roper is the granddaughter of the church's founder and was one of its staunchest members. But seven years ago, she broke away and now works to combat extremism. She sits down with Michel to talk about her journey and new memoir "Unfollow."

Once a leading practitioner of Russia’s brand of “gangster capitalism,” Mikhail Khodorkovsky now lives in exile in Britain, supporting the anti-Putin opposition. He spent a decade in jail in Russia based on politically motivated charges, and his story is the focus of a new documentary by Oscar-winning filmmaker Alex Gibney. They both join the program to discuss this quintessentially Russian story.

Come Tuesday, Montgomery, Alabama, will celebrate the inauguration of Steve Reed, its first African American mayor. The majority-black city is plagued by crime and economic inequality, in a state ranked dead last for education. As he prepares to take office, Christiane asks Mayor-elect Reed about his daunting to-do list and the history he is making.

Professor Leonard Kleinrock and his former student Vint Cerf – now Vice President of Google – are known as the founding fathers of the internet, after they pioneered the technology that underpins it. It’s changed the world and the very way we live, yet at the time, they had no idea just how big their work would become. Miles O’Brien sits down with them both to reflect on those early days.

Most of Kashmir's leaders have reportedly been detained since the disputed territory was stripped of its special autonomous status in August. Among them is former Chief Minister Mehbooba Mufti. Her daughter joins the program from New Delhi to try and get a near-silent international community to listen.

Democrats have taken control of the Virginia statehouse for the first time in decades, and after a tight election, Democrat Andy Beshear is declaring victory as Governor of the deep red state of Kentucky. How much can be read into these results as bellwethers for 2020? Republican campaign consultant Scott Jennings and political columnist for The Nation John Nichols join the program to discuss.

A group of musicians and performers are taking Broadway by storm with their new show, "Freestyle Love Supreme," masterminded - among others - by "Hamilton" creator Lin-Manuel Miranda. A meeting point between rap and improv, every day is different, as the show is based on audience suggestions. Hari sits down with three of the cast members for a lesson in freestyling.

President Trump's formal pledge to withdraw from the most ambitious climate accord to date - the Paris Agreement - comes at a time when we can see environmental emergencies right in front of our face. In California, raging fires burned nearly 100,000 acres, forcing thousands to flee their homes. Christiane speaks with the state's Lieutenant Governor to explore the crisis.