Mad Dog Morgan first hit the international headlines when he killed and mutilated a bus load of German tourists outside of Stonehenge in the 1990s. He followed that by indiscriminately killing tourists across England and Wales, before fleeing the heat of the police to America where he found his new taste for murder was easy to satisfy. He began to take an interest in ubers, managing to kill a string of them from New York to Los Angeles before coming up against Sanction, which was a sobering experience.

In custody, Morgan began to evaluate his life and realised that he was allowing his emotions to dictate his actions. Only by combining his wits with his berserker rage was he able to escape custody, although Sanction have since learned their lesson.

During his time since the clash with Sanction, Morgan has focused his attention not just on ubers, but also political figures. He successfully assassinated two governors and a senator before fleeing again, back to England. The pattern continued, with Morgan spending months on one continent before moving to the other. During one berserker rage in Boston, Morgan was rescued by Bloody Mary, and taken to a safe house where she beat him senseless and helped him recover. The two killers developed a relationship and have since worked together on several occasions, mostly on Bloody Mary's word. Morgan has continued to follow his own desires in America and England, and has not been caught again.

Morgan has a tendency to go berserk in stressful situations, most notably anything to do with conflict. His first response to these furies was to let them take him on whatever course they saw fit, and he quickly wound up killing innocents. He has since gained a semblance of control, but his personality is based on his temper and his disregard for self-control. He kills because he can, but is just as likely to spare someone because of the way they dressed or a word they spoke in utter fear. He and Bloody Mary enjoy each other's company, something Morgan has never experienced before.

“Cut me and I bleed. I bleed and you die.”

Mad Dog Morgan is an uber with a berserker fury which can increase his strength, resilience and ability to cause mental anguish to those who make contact with his mind. He is a seasoned killer and employs a pistol, but much prefers the personal touch.

Mad Dog Morgan wears black leather. He has a heavy leather jacket which he leaves unzipped to reveal his rippled chest and abs, tight leather pants with a Union Jack buckle, and gloves. He has change his appearance in the past, but seems to always gravitate towards a punk style.