Just a thought, had it after posting the reaction post and it's a bit heavy-spec for some of the spec-phobes that sometimes read my posts, so I thought I'd post it seperately.
...Did anyone else get the impression that the show is implying that Kevin's dad is Samandiriel?
He stopped himself from giving his angel name to Linda, and she wasn't too keen on angels and just said "the last time that angels tried to help my son" which doesn't really rule out that it's not the only time they've tried to help, or that it's not the only contact she's had with angels. Sooo, what if Kevin's half-angel? Show has had Jesse the half-demon anti-Christ who's still surfing in Australia for all we know, why not a half-angel
Nephilim?
Could be a red herring, show is very fond of those.
As I said, just a thought. Please, no information regarding episodes past 8.02 in comments please.