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: Ryan and Theresa are walking along the beach with ice creams. The amount of ice cream changes between shots. This is especially noticeable with Theresa's ice cream.
Kirsten: Is everything okay?
Seth: Hmm? Yeah, it's fine.
Theresa: I'm pregnant.
Seth: Well, except for that.
Trivia: Adam Brody originally auditioned for the part of Ryan Atwood.
Question: When Julie comes to Alex and Marissa's apartment and they argue, Marissa says that she'll just steal if she can't get a job, and says that Julie knows she is good at that. What is she referring to?
Answer: She is referring the episode entitled: The Best Chrismukkah Ever, episode 13, season 1. She goes out christmas shopping with Ryan and gets stopped by a security when she is out by Ryan's car. He asks to look inside her bag and finds a stolen watch and some other stolen things.