Ian Quinn

Ian Quinn is the secondary antagonist in the first season of Marvel's Agents of S.H.I.E.L.D. He was assumed to be the season's main antagonist, but this was a misinformation campaign to cover the identity of the true main villain.

He is portrayed by David Conrad.

Overview
Quinn is an affluent philanthropist and the CEO of Quinn Worldwide. He quickly becomes an enemy of S.H.I.E.L.D. throughout season one, as he is revealed to be working for the Clairvoyant (though no one knows who that is at the time).