Mastermind vs Hammerhead Facts
Creator
Jack Kirby, Stan Lee
Gerry Conway, John Romita
Universe
Earth-616
Earth-616
In Comics
The X-Men #4 - The Brotherhood of Evil Mutants
The Amazing Spider-Man #113 - They Call the Doctor...Octopus!
Citizenship
American
American
Marital Status
Single
Single
Occupation
Not Available
Not Available
Base
Not Available
Not Available
Relatives
Not Available
Not Available