Franklin Hall

"S.H.I.E.L.D.? S.H.I.E.L.D. is just as guilty of the same thing, experimentation without thought of consequence! Your search for an unlimited power source brought an alien invasion." "Fair point."

- Franklin Hall and Phil Coulson

Franklin Hall is a scientist working for S.H.I.E.L.D. before getting kidnapped by Ian Quinn. Agent Coulson and his team then goes to Malta to save him, only to find out that his plan all along was to get kidnapped.

Biography
To be added

Trivia

 * In the comic books, Dr. Franklin Hall becomes the super-powered villain Graviton.
 * Gravitron is the first character in the show that originated from the comics but did not appear in the films.