Tonight's extended conversation with Craig Unger will explore his new book "Den of Spies" investigating the controversial "October Surprise" allegations. The discussion centers on claims that Reagan campaign manager Bill Casey orchestrated a secret deal with Iran regarding the timing of the release of 52 American hostages during the 1980 presidential campaign between incumbent Jimmy Carter and challenger Ronald Reagan.

This complex historical question spans four segments tonight, examining Unger's decades-long investigation into what he describes as a clandestine operation involving intelligence operatives, political figures, and international intrigue that may have influenced the outcome of the 1980 presidential election.

The conversation will delve into Unger's evidence and reporting that led him to conclude the Reagan campaign had engaged in back-channel negotiations with Iran to delay the hostages' release until after the election, in what would have amounted to private citizens conducting unauthorized foreign policy.

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