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Radioactive Man is a major character from the TV series The Simpsons. He is voiced by Harry Shearer.


He appeared for the first time in the episode "Bart the Genius". He is a comic book superhero who acquired his powers after surviving an atomic bomb explosion. His sidekick is Fallout Boy, and his catchphrase is "Up and atom!" He is a member of the the Superior Squad. He also appeared in "The Simpsons: Tapped Out".

Powers and Abilities

Very few sources to Radioactive Man's actual super powers have been made. As a result, the extent of his powers are not discovered. It can be inferred that Radioactive Man has some level of superhuman strength and invulnerability to injury. In one Simpsons episode, Bart shows Lisa a comic where Radioactive Man is seen throwing a villain into the sun and quipping, 'Hot enough for you?'. In the planned Radioactive Man movie, a stunt was filmed in which he easily lifts a van off Fallout Boy.



  • There is a Marvel Comics villain named Radioactive Man; he is unrelated to the Simpsons character.
  • His archenemy is Dr. Crab, who originally looked like the Captain Marvel villain Dr. Sivana, but then mutated into a humanoid crab. He is very much like most stereotypical mad scientist villains, even speaking in a German accent.


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