S2, E9: It's girls against boys when Marissa and Summer decide to plan a girls' night out and include Lindsay (recurring guest star SHANNON LUCIO) in the festivities. Left to their own devices Ryan, Seth and Zach (recurring guest star MICHAEL CASSIDY), have a bonding session over video games and pizza but find it hard to stay away from their female counterparts. Julie and Kirsten collaborate on an idea to help the image of the Newport Group while Sandy and Caleb try to convince them there may be a better way.