User blog comment:Gcheung28/Fan Brain: Marvel's Agents of S.H.I.E.L.D. - "What They Become"/@comment-996391-20141210221444/@comment-10226643-20141210222331

I never connected that much with Whitehall anyway and thought he was boring but the main reason they did it was because the HYDRA storyline will be swiched out with the Inhumans storyline (I think).