Perdition: (n.) A state of final spiritual ruin; loss of the soul; damnation.
Nathan stares down the barrel of his handgun, at the cowering figure of Duke Crocker slumped beneath him. He knows that this is it. This is the final straw, the tipping of the scale. If he flexes his finger and squeezes that trigger, there's no going back. He will have passed the point of no return. This isn't an act of self-defence or protect an innocent from an attacker. Pulling this trigger is murder; simple, cold-blooded murder. Once he does this there is no redemption for him, no immunity or safety that he can claim. He will have become everything he has spent his life trying to stop. He will be a murderer.
For her.
Nathan narrows his eyes and the gunshot rings out in the metal hull of the ship.