Avengers (1963) #55
The Avengers are held captive by the Crimson Cowl, disguised as Jarvis! Plus, Ultron and Whirlwind escape during a fight with the Masters of Evil!
⭐ Key Issue
First Appearance: Ultron — first full appearance
The first full appearance of Ultron, Marvel's most dangerous robotic villain. Created by Hank Pym, Ultron becomes one of the Avengers' greatest recurring enemies. A major Silver Age key — Ultron's profile has risen enormously with the MCU Age of Ultron film.
Published: 8/1/1968
Series: Avengers (1963 - 1996)
