How did Cas know?

[Anu]

How did Cas know everything that soul-less Sam did to Bobby and Dean and everything else he did?

[Anno_Domini]

Because he's an angel?

[Anu]

Because he's an angel?

Ok. I just didn't know that angels knew everything that happened in detail =P

[LuthorKent90]

Dean told him!

[Kneel before Zod]

He just knows things. Or maybe Dean filled him in.

[superhippie2000]

Ok. I just didn't know that angels knew everything that happened in detail =P

yup angels know everything about what happens although they dont know when they are being tricked into spilling the beans lol.

[RedPhoenix23]

I just assumed Dean filled him in about Sam trying to kill Bobby when Dean called Cas to come check on Sam to see if his soul was actually in there and ask if Cas thought Sam would ever wake up. Say that 5 times fast, lol.

[Anno_Domini]

Ok. I just didn't know that angels knew everything that happened in detail =P

Well, if they know every name of every prophet, then I'm sure Castiel knows what goes on with the brother of the person he saved from Hell, lol.