Caucus Chaos: The controversial call, characters and surprises that made Iowa 2012 a year like no other.

Intrigue, uncertainty, surprises, scandal and controversy made the treasured Iowa Caucuses an event like no other.

Iowans take their caucuses seriously, as well as their responsibility to have their state begin the long journey to choose the next president. But they struggled for months, putting their support behind one candidate after another, as they struggled to decide which one could actually win.

Meanwhile, behind-the-scenes dealmaking, decision-making and a pay-to-play scandal tarnished the clean-cut reputation of the event.

Scandal took down a rising social conservative leader in the state, who double-crossed friends. And one late-night controversial decision may have derailed the political future of another party leader.

Presidential candidates, staffers and activists reveal never before told inside accounts of what happened, why they occurred and how they impacted the final results.

"Caucus Chaos" shares the real story behind the 2012 Iowa Caucuses with a look ahead to what their disputed finish means for the 2016 contest.