Larissa returns from her summer in Kyoto and insists on taking Carrie and Walt to a fabulous Japanese festival in the city, where Larissa meets Samantha, with an explosive result. Samantha seduces an acrobatic ninja. Back in Castlebury, Carrie's plans to remain zen backfire when she finds herself locked in a classroom alone with Sebastian. Mouse helps Maggie with her college applications, but Maggie is distracted when somebody from her past reappears. Meanwhile, Walt worries that his classmates will sense he is gay, and Harlan (guest star Scott Cohen) makes an offer Tom can't refuse. Recurring guest stars include Josh Salatin as Simon and Kate Nowlin as Barbara. Molly Sims (Las Vegas) also guest stars.