I think spoiling the first ep is OK. Um, I think the bit that really made me go 'whoa!' was the bit about how Nathan is in prison for almost the rest of the whole series. That's a MASSIVE spoiler.

How do you think I should change it? Or should I just tack a spoiler warning up?

Up to you. Either go through it and edit, or put up a spoiler warning. I just woke up and I'm not very smart. /o\