When i saw the promo for episode 2 and 3 for Agents of S.H.I.E.L.D. on Youtube i noticed something that started me to think of Franklin Hall becoming Graviton in the first episode he is in.
At 56-57 seconds (the link is down bellow) you see Franklin and Phil what it looks like walking at the wall. Could this mean we will see Franklin become Graviton allready in the first episode he is in?
Here is the link, take a look at it and tell me what you think by putting a comment down bellow :)