An impossible escape. A mysterious alliance. An unexpected reunion.

And a shocking discovery.

The CW has released the official synopsis for Supernatural Season 8, teasing the aforementioned developments and a whole lot more.

What can fans look forward to on the October 3 premiere, "We Need To Talk About Kevin" and beyond? Read through the network description below and get that countdown started...

Season Eight begins with Dean’s seemingly impossible escape from Purgatory, though Castiel is nowhere to be found. However, Dean isn’t alone. He’s returned with a mysterious comrade-in-arms whose reason for escape is perhaps more than Dean bargained for. Meanwhile, Sam finds himself reconciling the life he discovered while Dean was gone with Dean’s sudden reappearance.

As the boys struggle with their unexpected reunion, they make a shocking discovery that could lead them on a deeply personal mission to settle old scores. If only they could agree – is this a “family business” or isn’t it?.

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.