George Tarleton (Earth-1955)

"Once, I was a mere guinea pig for the scientists of AIM! But they did their job too well... and now... I am their master!"

- - MODOK

George Tarleton worked as a laboratory assistant to AIM before being used as a test subject for project MODOC (Mental Organism Designed Only for Computing), which caused his head to grow disproportionately from his body and giving him superhuman intelligence. He changed his name to MODOK (Mental Organism Designed Only for Killing) and became AIM's leader.