Brenda and Scott go on their first real date...to her church youth group. Mark and Jen's sex life becomes the talk of the school when Laurel mistakenly mentions something to Craig, while his sister Erin is nearby. Craig tells Shannon about his endangered frog project. Chris apologizes to Anika, who softens towards him, but is completely unaware of his bet with Gil, unlike Erin who reveals to Chris that she knows. Mark attempts to mend his friendship with Laurel but is shot down. Mark and Jen try to determine who told about their love life and Jen falsely accuses Laurel when it was really Shannon, Jen's best friend.