User blog comment:Theory of everything/The Renard Mystery/@comment-74.233.168.108-20120908015141

Nick and Renard are half brothers. Same father, different mothers. There's more to Nick than meets the eye. Renard is protective over Nick, could be for his own personal reasons or he might just be looking out for his little brother. The reason Nick can't see Renard's beastly side could simply be that they have more in common than we know yet. Nick's mom told him she was leaving in S2 ep1, but she didn't. Maybe mommy dearest isn't telling him all the truth about everything.