Biographical information
Real name

Simon Utrecht (Vector)
James Darnell (X-Ray)
Ann Darnell (Vapor)
Michael Steel (Ironclad)

Physical description

Gamma mutants


Male and Female

Personal information


Chronological and political information
Production details
First appearance

This Monster, This Hero

Voiced by

Cam Clarke (Vector)
Colleen O'Shaughnessey (Vapor)
Unknown (X-Ray; Ironclad)

Image gallery (0)

The U-Foes are a group of four cosmic radiated supervillains and are enemies of the Hulk.


Since they were Radiation based supervillains, they were imprisoned in The Cube until they were freed in the Breakout by an unknown person.

The U-Foes are the conterparts of the Fantastic Four, but their powers are different from them as they were exposed to cosmic radiation more than the Fantastic Four has.

They assisted the Leader in defending the Gamma Generator inside the ruined Cube from the Avengers and S.H.I.E.L.D. agents. They were defeated in battle. It is unknown if they escaped or remain captured when the second Gamma Dome expanded.

Notable Members


Vector 2

Vector brags while Black Panther sneaks up on him

Voice Actor: Cam Clarke

Vector is the leader of the U-Foes. He can telekinetically propel objects away from himself, but has a bad habit of talking too much. His weakness tends to be that he talks a little too much, which makes him arrogant and an easy target if hes not paying attention as demonstrated by Black Panther who knocked him out from behind.



X-ray attacking a S.H.I.E.L.D. agent

Voice Actor: N/A.

While in the comics, X-rays powers are varied from flight, invisibility, and emitting various forms of radiation. In "Gamma World part 1" he is shown to posesss electric type powers when he battled the Avengers inside The Cube when he attacked the team with the other U-foes.  


Voice Actor: Colleen O'Shaussgey

Vapor is a being made of pure gas and can only become human for brief periods of time. In "Gamma World" she seemed to be the easiest of the U-Foes to defeat since she can be blown away easily as demonstrated by Thor who freed Captain America from her suffocating "kiss".


Voice Actor: N/A

Ironclad's body is made out of strong, dense metal that can withstand heavy blows and blasts. He is also incredibly strong, able to go toe-to-toe with The Hulk. He attacked the Avengers and S.H.I.E.L.D. agents in the Cube but didnt prove to be that well of a fighter, as he was easly brought down by Thor and Captain America.