Seth Cohen is a fictional character from the television series The O.C., which aired from 2003 to 2007. He is portrayed by actor Adam Brody and is known for his nerdy personality, love of comic books, and passion for video games. Seth is the son of Kirsten Cohen and Sandy Cohen, and he often provides comic relief in the series while navigating the challenges of adolescence. Throughout the show, Seth develops a close relationship with Summer Roberts, played by Rachel Bilson. Their romance is a central storyline, showcasing themes of love, friendship, and personal growth. Seth's character is beloved for his wit and charm, making him a fan favorite among viewers.