(John Simm)

A demon hunter with a tragic past, Alex Butler hasn't had an easy life these past twelve years, travelling across the globe, fighting monsters and demons, hoping one day to find the one that started it all so he could take his revenge.

Not used to working with a team, Alex is often rash in the field, and rude to his teammates. Despite all this, he cares about making a difference to the world, even if his moral code is a little more gray than you'd want in a hero.