Alastair is a white-eyed demon and possibly the second demon ever created . Even though most of his past is unknown, his millennium of ancient knowledge suggests that he is almost as old as Lilith. He called Castiel "Kiddo",  much like the Princess of Hell Dagon called Castiel as a child. Uriel also seemed to know him, much like Castiel knew Ramiel as if it were a very exceptionally ancient demon. It is thus hinted that he has had several experiences with angels.
According to Andrew Dabb is not absolutely sure whether Alastair will come again soon  . I am the only one who wants Alastair to be back on the screen soon. I am the only one who wants Alastair's comeback.
I also wonder when the show finally states that Alastair was irrefutably the second oldest demon in existence to have been the myth of the show.
- ↑ The Essential Supernatural
- ↑ Heaven and Hell
- ↑ https://tvline.com/2020/01/15/this-is-us-season-4-spoilers-trilogy-randall/