Castiel is the only person that matters. You are not going to dissuade him of this fact. He never did tell Istredd that he, ah, 'met up' with both his siblings at Josselyn's execution. It wasn't important. He's so about not making mistakes and yet he keeps being 'led into' them every time. By now he should know better than to listen to someone or something coercing him into something.

Unfortunately because of that meeting at the execution, he knows about his brother being tricked by Metatron, which ultimately did more damage to Heaven than Lucifer ever had.

I'll figure Hayle out in due time, he assures. It's on his to-do list. No city is as perfect as that place appears. I tried to dig into backstreets and found nothing out of sorts. Even rich cities--especially rich cities--have problems.

Glassware and crystal often have imperfections. He just needs to know what they are, and if its better or worse than Thorne. He has wondered if his rocky relation with Ambrose might benefit him into getting in good with Anastasia, but that's a different consideration.