Caught between the devil's wrath and humanity's pestilence, actor Mark A. Sheppard's demonic character Crowley will return to The CW's "Supernatural" this season to mesh his own unique agenda with the Winchester boys.

Last seen in the Season 5 episode "Abandon All Hope," Crowley wants Lucifer (Mark Pellegrino) destroyed because he believes that eventually Lucifer will turn on the demons after humanity's fall. Consequently, Crowley is back for an unholy alliance.

Returning to "Supernatural" was an attractive prospect for Sheppard, who finds his character's demonic nature a fascinating concept.

"I love the idea that theres not an ounce of fear, not one iota of fear at all," Sheppard said in an interview with iFMAGAZINE. "Theres that great moment when Im in my office and Sam [played by Jared Padalecki] pulls the gun. He puts it to my forehead, Im sitting there with Jared, the guns to my forehead, he pulls the trigger and Im, 'You need some more ammunition for that.'

"Theres never an instance where Crowley doesnt know whats happening. Theres never an instance where Crowley isnt literally two steps ahead. Hes superhuman. Hes beyond the concept of human. And theyre just mere mortals, as far as Im concerned."

However, Sheppard credits his character's true strength to the script.

"Its a fabulous character," Sheppard said. "Its written by Ben Edlund, one of my favorite writers of all time. Ive worked with him in several capacities, worked with him on 'Firefly.' Ive always been a big fan of his work. ... He has an incredibly dry sense of humor, very, very intelligent man, very witty, very dry and a truly lovely human being."

But one persistent question of any Season 5 "Supernatural" script remains: Will God show up?

"Itll be interesting," Sheppard teased. "That wouldve been my role, Im sure, if Id waited long enough [laughs]."

"Supernatural" airs Thursdays at 9 p.m. ET on The CW.