Entertainment Tonight ET Online ETOnline.com

Fans have spent the last four years learning the ins and outs of the ad game on AMC's Mad Men. Now, the network is revealing what it really takes to land a big client on their new reality series, The Pitch.

Premiering tonight at 9 p.m., The Pitch follows two warring ad agencies as they formulate the perfect campaign.

Watch ETOnline's exclusive sneak peek at this fascinating new series!