Six months after the lightning accident, he built an "ultra-frequency" transmitter from radio and television parts, and used it to take mental control of Iron Man, forcing him to free him from prison. He built a new fortress on an island in the Atlantic Ocean and brought his daughter Carla and his accomplices there. Feeling guilty for having abandoned his daughter his entire life in favor of his criminal career, he decided to take over the world and give it to her.

Strange launched an S-Bomb (a 200-megaton nuke) into the upper atmosphere as a demonstration of his destructive power, and then threatened to destroy the entire planet unless every nation surrendered to him within 24 hours. Several nations traced his broadcast and launched nuclear bombs at his island, but he was protected by his virtually indestructible force field. Iron Man, however, approached the island by submarine and, correctly figuring the field would not extend below the surface of the water, he tunneled into Strange's base from underneath.

IM confronted Strange and destroyed is main power generators, but the backlash shorted out his armor as well. However, Carla, appalled at her father's despotic plans and evil nature, threw two flashlight batteries to Shellhead! As Iron Man gained enough energy from the batteries to restart his armor, Strange fled, escaping the island through unknown means. Strange's accomplices were rounded up by the military, and his island stronghold was dismantled.

First ever & IM appearance:  Tales of Suspense #41.

(Thanks to the Unofficial Handbook to the Marvel Universe for the info assist.)