The Circus

The campaigns of three "outsiders" - Ted Cruz, Bernie Sanders and Donald Trump - are given behind-the-scenes attention on the road to the Iowa caucus. Series premiere.

The second episode follows Sen. Marco Rubio, Gov. Chris Christie, former Gov. Jeb Bush and Gov. John Kasich as they prepare for the all-important, first-in-the-nation primary in New Hampshire.

This episode follows the angst and drama leading up to the Iowa caucuses, with a showdown brewing between Democrats Bernie Sanders and Hillary Clinton and the GOP's first real test of outsider candidates versus the establishment.

The fourth episode goes inside the Iowa fallout and the momentum leading into New Hampshire's primary. Who¿s got it? Who doesn't? And how can the Clinton and Trump campaigns pick up the pace to beat back the surge of Sanders and Cruz?

From the electric jolt of New Hampshire to the hard truths coming up in South Carolina and Nevada. Trump tastes victory, Kasich picks up momentum - and Bush faces the prospect of an impending do-or-die reality.

As the campaigns head towards the final stretch leading to Nevada and South Carolina, there's growing anxiety among both frontrunners and stragglers about just how high the stakes are - and the significance of falling behind.