Doctor Diehard

Doctor Diehard is the name of two fictional DC Comics supervillains.

First Diehard

The first Doctor Diehard was part of the evil gang called the Extremists. He was based on the Marvel Comics supervillain Magneto, and like him has the ability to generate powerful magnetic fields.

Diehard Robot

The second Doctor Diehard was a robotic duplicate of the first, one of many robots created by the inventor Mitch Wacky on the otherdimensional world of Angor, as part of a theme park attraction. After the death of virtually all heroes and villains on the planet, the evil Dreamslayer used the robot duplicates to re-create his villain team, the Extremists. After traveling to Earth, the Extremists almost took over the world before being defeated by Justice League Europe. The Extremists robots were then exhibited in Madame Clouseau's Wax Museum in Paris. They were later used by Dreamslayer a second time on the island of Kooey Kooey Kooey, and still later as pawns of Twilight in a battle with Supergirl. The Diehard robot had all the powers of the original.

Countdown

In the Countdown to Final Crisis tie-in series Lord Havok and the Extremists, A new version of Diehard is introduced on Earth-8. This version runs a school for Metahumans, and chooses the best students to join his special team, the Zen Men, much like Marvel's Professor X.