Alexander Summers is the younger brother of Scott, his parents being Air Force pilot Christopher Summers and his wife, Katherine Anne. During a flight back from Anchorage, a Shi'ar Imperial freighter materialized above his family's plane. The Shi‘Ar wanted no witnesses, so the plane was set on fire. With only one parachute left, Kate Summers strapped Scott into it and tied Alex to him. She and Chris said their final good-byes to their children and pushed them out the plane door. They were teleported from the plane a moment before it exploded and transported to the Shi'ar craft, where they were kept as Earth specimens. The explosion set the Summers brothers' parachute on fire. During the fall, Scott first manifested his optic beam to lessen the impact of the fall and he shielded Alex from their landing with his body. Alex and Scott were brought to an orphanage in Omaha, Nebraska, secretly run by Mr. Sinister, who had registered Scott manifesting his mutant power. Sinister believed that Scott was the Summers brother with the most potential, so he had Alex adopted away from the orphanage to both separate them and render Scott emotionally vulnerable. [Uncanny X-Men (1st series) #156, X-Factor (1st series) #39, 115]

Alex was raised by the Blandings, whose son, Todd, was killed in a car accident, leaving them and their daughter disturbed. They constantly tried to make Alex fit into their image of their son, which he tried to do as best as he could. When the boy who killed Todd kidnapped Alex and his foster sister, Haley, and then tried to blow up their house, Alex manifested his powers for the first time, incinerating the boy. Sinister appeared, quite surprised that Alex’s potential even exceeded that of Scott but, unfortunately, he seemed lacking any control over his gift. He placed psi-blocks on both Alex and Haley, causing them to forget everything that happened that night. [X-Factor (1st series) #minus 1]

Alex continued to grow up, and eventually became a very good geophysics student in college. When he graduated, his brother, Scott, and his teammates among the X-Men visited the campus, only to witness Alex being kidnapped by men in Egyptian garbs. As Cyclops, Scott followed and, in the Living Pharaoh’s lair, Alex used his power by pure instinct, when the Pharaoh was about to kill Scott. Still, the villain gained the upper hand again and the reason for the kidnapping became apparent.

Both he and Alex were metabolizing the same kind of cosmic energy, keeping the Pharaoh from using his abilities to their full potential. Therefore, he put Alex into an isolated containment box and the Pharaoh reached his full power, transforming into the gigantic Living Monolith. Still, Alex was able to generate a powerful plasma blast from inside his containment chamber, destroying the entire building, and disabling the Monolith. Alex believed himself to be too dangerous to be around others people, so he ran away. [X-Men (1st series) #54-56]

In the desert, Alex was approached by the Sentinels, who had been restarted by Larry Trask. Taken to their base, Trask offered a way to control over his power. Alex agreed and was given a costume, which regulated his energy output, and the codename Havok.

To spare another captive mutant, the magnetic Lorna Dane, from being examined and tortured in Trask’s labs, Havok continued to work for Trask. Unbeknownst to him, the Sentinels went after the X-Men and, soon, the Iceman was captured too. Havok learned of the full scale of Trask‘s operation and opposed him, but they all were placed in stasis tubes. When the other X-Men arrived, they were one by one captured, only Cyclops remaining free. He managed to free his brother and, together, they blasted some of the robots, resulting in a big explosion. Cyclops dealt with the remaining Sentinels by outsmarting them with their own logic. However, Havok was severely injured by the debris. [X-Men (1st series) #57-59]

The X-Men didn’t want to go to a common hospital, as it would have endangered their secret identities. Instead, they found the address of a Dr. Karl Lykos in Xavier‘s notes and he was eager to help. Alex was taken to Lykos‘ practice for treatment, though, in actuality, Lykos' treatment was to drain lifeforce from his victims, feeding his own vampiric urges. When he tried to absorb Havok's lifeforce, the incredible amounts of mutant energy triggered his transformation into Sauron, a pterodactyl energy vampire. Without knowing that the creature was the same doctor they had met only hours before, the X-Men battled with Sauron until his energies were depleted. Returning to his home, Lykos once more wanted to leech off Havok but was intercepted by his girlfriend, Tanya, and Alex was released with a clean bill of health. [X-Men (1st series) #60-61]