Grace and Tom's (recurring guest star BRADLEY COOPER) relationship is exposed when a fellow professor catches them kissing in Grace's office. Later in the evening, Peter turns to Grace for advice when he finds out Courtney is having sex with her boyfriend. Meanwhile, Jack's relationship with classmate Katie (recurring guest star KATE MARA) progresses. And in an effort to become popular at school, Bobby and Warren (recurring guest star DEAN COLLINS) decide to have a sleepover and come up with a shocking idea to make the evening memorable.
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