In the first released clip for the fall-finale of Marvel's Agents of SHIELD we see the aftermath of Agent Coulson (Mack is Acting-Director) swan-diving into another world. Mack tries to assess the situation and things go from bad to worse as they have to infiltrate and control the heavily armed HYDRA base where they are stockpiling Inhumans so they can open the portal to get their people back. You know, normal SHIELD stuff.
Marvel's Agents of SHIELD airs Tuesdays at 9 PM on ABC.
And if it seems weird to see Coulson in action, the precedent was set on the way to Thor's Hammer.