FRONTLINE tells the story of what led to Vladimir Putin's war on Ukraine. Veteran filmmaker Michael Kirk and his team examine the events that shaped the Russian leader, the grievances that drive him, and how a growing conflict with the West exploded into war in Europe.

A year after President Joe Biden's inauguration, more than two-thirds of Republican voters believe his election was illegitimate. The idea that the 2020 election was stolen from Donald Trump is now a defining issue of the Republican Party. Yet the story of how lies about election fraud made their way to the center of American politics has not been entirely told. 

In a new investigative collaboration, FRONTLINE and ProPublica trace the hidden sources of disinformation about the 2020 election, demonstrating how a handful of people have had an outsized impact on the current U.S. crisis of democratic legitimacy.