Graviton

Some leeway has to be given when it comes to Marvel Cinematic Universe character depictions on television shows, as budgetary constraints don’t necessarily allow for particularly great depictions of certain characters – but what Agents of S.H.I.E.L.D. did (or at least have done so far) with Graviton is unforgivable.
Giving minor villains like Blackout a one-episode arc is fine, but Graviton is a major Avengers villain with great powers in the comics – and all we’ve seen of him so far is the feeble scientist side. Franklin Hall appeared in the season one episode The Asset – played by Ian Hart – and subsequently disappeared from television completely after that.
He had used the element Gravitonium to experiment with gravity, before being sucked into it and apparently perishing. However, his face appeared in the element at the end of the episode, suggesting he might still be alive within it.
He seems to have been forgotten, however, making his episode one of the many sub-plots that has been scrapped. Hopefully he will return in the future with a chip on his shoulder and with the power fans know he possesses in the comics – the ability to alter gravitational forces.
