The guest star bonanza for Supernatural continues with two actors who are very well known to sci-fi fans.  One will be a new guest star while the other is a return appearance for a memorable Supernatural character we've already seen.

SPOILER WARNING: This article contains info about upcoming episodes of Supernatural.

First, Mark Sheppard announced via Twitter that he'll be returning as Crowley, the mysterious Crossroads Demon who wanted to help the Winchesters kill Lucifer.

You'll also recognize Sheppard from Battlestar Galactica, Dollhouse, 24 and upcoming episodes of Leverage and Chuck.  In other words, as I said the first time he was on Supernatural, getting Mark Sheppard is like cementing your place in the land of TV awesomeness.

In other Supernatural casting news, TV Guide Magazine reports that Stargate actor Michael Shanks will soon show up on Supernatural for his own guest role.  Shanks will play Rico, a man in a local militia dedicated to a cause.  Hopefully that cause is stopping the Apocalypse.  Shanks is another big guest star in the world of sci-fi and he'll soon be seen as Hawkman on Smallville.

With these two on board for the second half of season 5, Supernatural is certainly upping its pedigree of sci-fi guest stars.



Source: TV Guide Magazine
(Image courtesy of the CW)