Dr. Saul Erdel operated in a observatory outside of Gotham City's observatory. While conducting an experiment to sending radio signals into deep space, his experiment somehow accidentally teleported Martian J'onn J'onzz into his observatory. Erdel was surprised of J'onn's appearance and suffered a fatal heart attack. Before succumbing to his death, Erdel somberly apologized J'onn for stranding him on Earth and warns that human society will not take too kindly to him as people will fear him because of his appearance, and strongly recommended to not reveal himself and take the time to study humanity.
- 2 Appearances of Saul Erdel (Earth-21)
- 1 Images featuring Saul Erdel (Earth-21)
- Quotations by or about Saul Erdel (Earth-21)
- Character Gallery: Saul Erdel (Earth-21)