ABC's "Lost"

[Agent]

I picked up on the dentist thing too, but I read into it as an explanation as to how they keep their teeth clean and healthy on the island. I also noticed that Walt's dog didn't bark at the person who attacked Sun. The attacker wasn't who I originally thought it would be but it was someone they knew, which explains why the dog kept on his merry way out of the scene without barking (he didn't consider the attacker an intruder.)