What happens behind the scenes of a hit NBC show as it airs live

NBC comedy "Undateable" is doing something no other scripted comedy on TV is doing. It airs live every week, twice a week for both the East Coast and the West Coast.

In recent years, the live-aired episode was used as a special event and ratings boost by shows like "30 Rock." Last season, the show ended with a live finale episode. Then, NBC renewed it for a third season of all-live episodes.

Airing Friday at 8 p.m., "Undateable" follows a group of close-knit friends living in Detroit, helping each other figure out their lives.

Approaching its third season finale, the "live" airings of the show have evolved to include weekly guest performers, like last week's musical guest Weezer. It has also become very driven by social media, and departs from traditional TV sitcoms by breaking the fourth wall.

Creator and Executive Producer Adam Sztykiel agreed to give Business Insider's readers a behind-the-scenes look at a night when it was airing live.

Here's a look at what goes down when the cameras aren't running on "Undateable":