Plot hole: Ryan says that he has left his watch at the motel after sleeping with Theresa, and goes back to get it. However, at the end of The Goodbye Girl (the episode before) he is seen wearing it as he gets out of the car to go and talk to Theresa, only to find she's gone back to Chino. The whole story of Ryan and Seth going back to get his watch from the motel is just an excuse for them to discover the whole Luke/Julie affair.
The O.C. (2003)
1 plot hole in season 1
Starring: Peter Gallagher, Adam Brody, Mischa Barton, Kelly Rowan, Ben McKenzie
Continuity mistake: When Ryan is lighting Marissa's cigarette with his, at the start of the shot it's full, then the shot goes to Ryan and it's still full. But then the shot goes to Marissa and if you look at Ryan's cigarette you can see it is almost all gone. Then the shot goes to Ryan and the cigarette is full again. (00:09:00)
Kirsten: Is everything okay?
Seth: Hmm? Yeah, it's fine.
Theresa: I'm pregnant.
Seth: Well, except for that.
The Rescue - S1-E8
Trivia: Seth is surprised that Summer has read the book "Madame Bovary". She explains that it's the favorite book of patient Tom Shales, who is incontinent (lacking normal voluntary control of excretory functions). Tom Shales is a Washington Post critic who blasted "The O.C." in his review.
Question: What is the name of the song that plays at the end of the last episode of season 1, when Ryan is leaving in the car and Seth in his boat?
Answer: Hallelujah by Jeff Buckley.
Bobbert