Rex Tyler also appeared in the first season of the DC Universe series Stargirl, portrayed by Lou Ferrigno Jr.

He found that concentrated doses of the "miraclo" given to test mice increased their strength and vitality several times that of normal, but only for one hour.

According to Jess Nevins' Encyclopedia of Golden Age Superheroes, "Hourman fights a variety of Doctors: the robot-wielding Dr. Darrk, the hypnotist Dr. Feher, the big-headed genius Dr. Glisten; the occultist and alchemist Dr. Iker; and the bio-engineer Dr. Togg.

Eventually, his adventures ended, but with the resurgence of super-heroes in the mid-1950s and early 1960s, interest in the Golden Age heroes returned, and Hourman was soon appearing as a guest star in issues of Justice League of America.

[11] Through the use of Miraclo, Hourman can possess superhuman strength, speed, stamina, and durability, night vision, underwater survival, and expert martial arts skills for one full hour.