In a new behind-the-scenes clip, "Agents of S.H.I.E.L.D" Visual Effects Supervisor Mark Kolpack details the process of transforming Lash from human to inhuman -- something he describes as a brand-new process for network television.

Blair Underwood also describes his take on becoming a monster, and keep Andrew Garner's essence throughout the painful mutation.

Starring Clark Gregg, Chloe Bennet and Ming-Na Wen, "Agents of S.H.I.E.L.D." airs Tuesdays at 9pm EST on ABC.