Rex Tyler aka Hourman is one of the supporting protagonists in Batman: The Brave and the Bold.
He is voiced by Lex Lang.
Born and raised in New York, Rex Tyler developed in interest in chemistry and later, biochemistry. In the late 1930's, he began working for the Bannermain Chemical Company in vitamin and hormone research. Tyler created a new steroid that he named "Miraclo." He discovered that it enhanced his physical attributes for only one hour at a time. Tyler became an over night millionaire and pharmaceutical magnate. He began to see the evil and corruption of society and decided to make a difference for the common good. With these pills, he became the Man of the Hour and later, Hourman. He then joined the Justice Society of America. It appears that he was the one who taught Batman to use good one-liners in battle.
Hourman and the entire Justice Society were attacked by Faceless Hunter and implanted with Starro clones.