MODOK (also written as M.O.D.O.K.; an acronym for Mental/Mobile/Mechanized Organism Designed Only for Killing) is a fictional character. It appears in American comic books published by Marvel Comics. Created by Stan Lee and Jack Kirby, the character first appeared in Tales of Suspense #93 (September 1967).

A creation of the villainous society known as A.I.M., he used to be a A.I.M. scientist named George Tarleton but was forcibly mutated into a grotesque and horrific monster/machine both in appearance and attitude. A.I.M. origanally wanted to use him as their weapon but he took them over instead.

He became a major recurring antagonist for both Captain America, agents of S.H.I.E.L.D., The Hulk, agent Sharon Carter, and even some villains such as Doctor Doom.

IGN's list of the Top 100 Comic Book Villains of All Time ranked MODOK as #100.

Debuting in the Silver Age of Comic Books, MODOK has appeared in over four decades of Marvel continuity, and starred in the miniseries Super-Villain Team-Up: MODOK's 11 #1–5 (Sept.–Dec. 2008), the self-titled one-shot MODOK: Reign Delay #1 (Nov. 2009) and the miniseries MODOK: Head Games #1–4 (Dec. 2020–April 2021), the last of which was released as a promotion for the self-titled animated series M.O.D.O.K. (2021), in which MODOK (and his younger alternate self, the Anomaly) was voiced by Patton Oswalt.

Several original incarnations of MODOK have been adapted to the Marvel Cinematic Universe (MCU) multimedia franchise: Darren Cross (portrayed by Corey Stoll); Anton Ivanov / the Superior, portrayed by Zach McGowan; Ernest Vigman, portrayed by Keith David; and Aldrich Killian, voiced by Nick Sullivan.

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