It's girls against boys when Marissa & Summer decide to plan a girls' night out & include Lindsay (recurring guest star SHANNON LUCIO) in the festivities. Left to their own devices Ryan, Seth & Zach (recurring guest star MICHAEL CASSIDY), have a bonding session over video games & pizza but find it hard to stay away from their female counterparts. Julie & Kirsten collaborate on an idea to help the image of the Newport Group while Sandy & Caleb try to convince them there may be a better way.