Ethan and Albert Arlington and Dr. Vincent and Dr. Harold
Ethan
Ethan is a manic, unpredictable hallucination, visible only to the unstable Dr. Harold, pushing him closer to insanity.
Albert Arlington
Albert Arlington, a ruthless mobster, leads a crime gang with cunning dominance. He hallucinates Dr. Harold, his unpredictable and exclusive confidant.
Dr. Vincent
Dr. Vincent, a stoic, stern, and dominant mental hospital doctor, is determined to sedate Dr. Harold.
Dr. Harold
Dr. Harold, an old, clumsy but brilliant scientist, often forgets his own inventions.