AceShowbiz -

Another evil will come to disturb Winchester brothers, Sam and Dean, in "Supernatural". Alastair, who will be played by Mark Rolston, is the next demon character from hell that will join the set to create madness. It has been confirmed that the actor will get his first debut on the horror series on November 13 episode, entitled "Hell's Angels".

The new devil is described as, "calm and composed demon with a placid smile that belies his simmering sadism and evil. He's one of the top demons in Hell. He's electrifyingly powerful."

The episode where Alastair appears will reveal some clues that the new devil has some sort of connection to Lilith, the former demon who is trying to create the world's end. As "Supernatural" insider tells Michael Ausiello from Entertainment Weekly, "He (Alastair) knows Lilith from Hell, but it's unclear exactly which of them is the big Big Bad, or if it's even one of them."

The insider adds, "There are a lot of new mythological elements and characters coming into play this season." It seems like Lilith will have a competitor or even a companion to make the Winchesters work hard.

Mark Rolston is an American actor, specializing in villain characters due to his trademark icy stare which is well known on his roles in "The X-Files", "Aliens", "Cold Case", etc. In March 2008, he was filming for a role in "Saw V".