Peter Lewis, played by Bodhi Elfman, is one of these show-shaking villains.

The title of the episode comes from how Lewiss victims see him when they are hallucinating.

As a child, Lewis lived with his parents in a group home they ran.

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Lewiss formidable mathematical mind is put to use in his hunt for victims.

Lewis injects his victims with a cocktail of drugs that make them hallucinatory and highly susceptible.

He forces some of them to kill their own loved ones.

Peter Lewis (Bodhi Elfman) talking to Hotch in Criminal Minds

Others, he makes take their own lives.

is one of the more puzzling inCriminal Minds.

Lewis eventually captures BAU Agent Aaron “Hotch” Hotchner and drugs him.

A drawing of Mr. Scratch in Criminal Minds.

Hotch resists and realizes that Lewis himself testified against his father.

Lewiss wave of killings turns out to be a form of internalized guilt.

The BAU soon realizes that Lewis is once again committing crimes, but finding him becomes increasingly difficult.

Hallucination of Mr Scratch in Criminal Minds.

Lewiss violent and chaotic actions left a more lasting mark than almost any of the othermemorable unsubs onCriminal Minds.

Criminal Minds