On tonight's CBS Evening News podcast -- the final face-off between President Trump and Joe Biden at tonight's presidential debate in Nashville - what to expect as the candidates take the stage and will tonight's event be enough to change voters' minds? Also -- the latest on the Iranian plot to interfere with the upcoming US presidential election - what Tehran hoped to gain by sending thousands of bogus emails to American voters.

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CBS Evening News with Norah O'Donnell, 10/22