In the July 2009 edition of the [[Supernatural: Official Magazine]] - Jensen describes their first meeting:
[[Image:CastielCastiel01.jpg|rightthumb|thumbleft|300px|Castiel makes an entrance]]
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"Because of the way the show is [structured], we have lots of guest cast come on week after week, and some of them have been good and some have not been as good, so I'm always kind of hesitant to really understand what the character's going to be because you never know who's going to play it.