It was a plot device worthy of any film noir thriller. A shadowy figure, keeper of the secrets to a national crime, reveals snippets of information...

Follows the crime and scandal that took down President Richard Nixon the day of the break-in at the Watergate Hotel.

Previously unreleased material outlines the campaign against Bill Clinton's presidency, from his days in Arkansas up to his impeachment trial.

ABC's Sunday morning political affairs program, currently hosted by George Stephanopoulos.