Agents of S.H.I.E.L.D.: What They Become

"What They Become" is the tenth episode of the second season of the American television series Agents of S.H.I.E.L.D., based on the Marvel Comics organization S.H.I.E.L.D. (Strategic Homeland Intervention, Enforcement and Logistics Division), revolving around the character of Phil Coulson and his team of S.H.I.E.L.D. agents as they race to destroy an ancient Kree city before Hydra can get to it and unlock a potentially extinction-level event. It is set in the Marvel Cinematic Universe (MCU), sharing continuity with the films of the franchise. The episode was written by Jeffrey Bell, and directed by Michael Zinberg. Clark Gregg reprises his role as Coulson from the film series, and is joined by principal cast members Ming-Na Wen, Brett Dalton, Chloe Bennet, Iain De Caestecker, Elizabeth Henstridge, and Nick Blood. The episode introduces the Inhumans to the MCU, and reveales that principal character Skye (Bennet) is actually comics character Daisy Johnson, while guest character "The Doctor" (Kyle MacLachlan) is Calvin Zabo. "What They Become" originally aired on ABC on December 9, 2014, and according to Nielsen Media Research, was watched by 5.29 million viewers. The episode received a positive critical response, with the performance of guest star Kyle MacLachlan praised, and the introduction of the Inhumans, along with the character reveals, highlighted as groundbreaking and exciting, though also potentially confusing or insignificant to non-comic book fans.