Shriek was a scientist named Walter Shreeve who worked at Wayne-Powers. Eventually, he was contracted by the CEO Derek Powers to kill Bruce Wayne and the new Batman; Terry McGinnis, using his sonic supersuit. After losing his hearing in a confrontation with McGinnis, Shreeve vowed revenge against him.
Shriek was created by Stan Berkowitz, first appearing in the Batman Beyond episode, "Shriek" (1999).
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