Real Name: N/A
Occupation: Villain
Marital Status: Single
Base of Operations: Gotham City
Height: N/A
Weight: N/A
Eyes: N/A
Hair: N/A
First Appearance: Batman #240 (March, 1972)
Created By: Denny O'Neil

Dr. Moon has no superhuman abilities but is an expert in gene therapy, psychological conditioning and torture. He sells his services to finance his experiments and has taken work for the Joker and the Suicide Squad among others in the past. When Amanda Waller hired him, he was used to work on Plastique. As long as he is paid he doesn't seem to care what his employers do. He is also apparently an employee of the Sunderland Corporation and an associate of the Captains of Industry; he oversees the metagene operation that changes Air Wave into Maser.

He teames up with fellow villainess Phobia, and the pair are seen aboard the former Injustice Gang satellite during the Identity Crisis. According to Merlyn, every time Moon and Phobia came to the satellite, someone goes missing.

Dr. Moon is killed in a fight with Kate Spencer when, during a savage hand-to-hand confrontation, she stabs him with his own scalpel.