Arianna is guest hosting "The Rachel Maddow Show" tonight and will be sending real time video from behind the scenes. Scroll to the bottom for a tour of Rachel's NBC digs and a rundown of tonight's show, then work your way up and watch Arianna prepare to fulfill her hosting duties.
And keep checking back for more videos as air time approaches.
Exec Producer Bill Wolff On Arianna's Performance
A Quick Tour Behind The Scenes
Last Minute Preparations
Arianna Records The Cold Open
Arianna Presides Over Staff Meeting
Arianna Takes Over Rachel Maddow's Office