Mark Horley (Earth-MLJ)

Real Name

Mark Horley

First Appearance

Top-Notch Comics #20 (1941)

Original Publisher


Created by

Harry Shorten and Warren King

Golden Age Origin

Mark Horley was a criminologist whose great intellect drove him to crime to satisfy his ego. In his lab, he created a formula which changed him in a Dr. Jekyll and Mr. Hyde fashion. By night, he was a hideous Monster terrorizing the streets. By day, he was working with the police investigating his own crimes. The Black Hood caught on to Mark's dual lifestyle and when confronted, the Monster took poison capsules and died.

Golden Age Appearances

  • Top-Notch Comics #20


  • Part of this text was taken from the DC Database with their permission.

See Also

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