Ultron is a fictional character that appears in comic books published by Marvel Comics. The character first appeared in Avengers #54 (1968), and was created by writer Roy Thomas and artist John Buscema.
Although Ultron first appears in Avengers #54 (1968), the character is disguised for the majority of the issue as the Crimson Cowl, with his face only revealed on the last page of the issue and no name given to the character. The character leads the Masters of Evil against the Avengers. In the following issue, #55 (Aug. 1968), the character is identified as Ultron-5, the living automaton, although his origin is still unknown. In Avengers 57 - 58 (Oct-Nov. 1968) in a flashback sequence it is revealed that Ultron is the creator of the "synthezoid" the Vision, whom it tries to use as a weapon to destroy the Avengers. The Vision, however, destroys Ultron with the aid of the Avengers.
Further flashbacks reveal that he is the creation of Henry Pym, and based on Pym's brain patterns. The robot gradually developed its own intelligence and rebelled, and almost immediately suffers from an Oedipus Complex, whereby it feels irrational hatred for his "father" Hank, and demonstrates an interest in Hank's lover Janet van Dyne, the Wasp. Rebuilding itself and upgrading five times, Ultron then hypnotizes Pym and brainwashed him into forgetting that the robot had ever existed.
The character's next appearance is in Avengers #66 – 68 (July – Sept. 1969), where the character, now referring to itself as Ultron-6, uses the fictional alloy adamantium to upgrade his body to an almost indestructible state. Taking the name Ultimate Ultron, its plans to destroy humanity are again thwarted by the Avengers.
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