Mack later goes on to become the director of S.H.I.E.L.D due to the ill health and subsequent death of Phil Coulson. In the final episode, "What We're Fighting For", Mack continues to lead S.H.I.E.L.D.
Mack eventually assumes the role of S.H.I.E.L.D's director following Phil Coulson's poor health and subsequent death. In the concluding episode, "What We're Fighting For," Mack continues to lead S.H.I.E.L.D.