Very interesting interview with Lucas Bryant. It may contain spoilers, but it's worth reading it.
“When I first read the script for the season one finale I was pretty shocked and surprised as well as excited,” says Bryant. “The information about Nathan’s real and adoptive fathers was something that the writers had kept from me, on purpose, I imagine, and also because I didn’t want to know things that I didn’t need to know. I knew they were putting some big stuff in that particular episode, but I had no idea exactly what.
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