Sitting members of Congress aiding and abetting a plot to overthrow the government. Insurrectionists criminally charged with plotting to end American democracy for good. Justice Department prosecutors under crushing political pressure. Rachel Maddow Presents: Ultra is the all-but-forgotten true story of good, old-fashioned American extremism getting supercharged by proximity to power. When extremist elected officials get caught plotting against America with the violent ultra right, this is the story of the lengths they will go to… to cover their tracks.

Episode 1: 

It started with a plane crash. The tragic, mysterious crash of a commercial airliner in the summer of 1940 left a scene of devastation in rural Virginia -- and a series of unanswered questions. The cause of the crash was unclear. Among the dozens of people killed was a sitting U.S. senator. His presence on the flight and the strange circumstances surrounding the crash would end up revealing threats to American democracy itself.