Adam Brody & Rachel Bilson Characters: Seth Cohen & Summer Roberts Show: The OC These two have kept The OC afloat during rough creative stretches and have generally been the highlight of the show over its first three seasons. Their chemistry is palpable and are the sources of often raucous humor. Start Page / #10 / #9 / #8 / #7 / #6 / #5 / #4 / #3 / #2 / #1