"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., it follows 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. Wikipedia