'POST-NUCLEAR' A post-nuclear warhead has gone missing in the Middle East. Eighteen S.H.I.E.L.D. agents are dead. Who you gonna call? What happens when Black Widow and Lady Bullseye meet? Sparkles. And what happens when you get too many sparkles? Explosions, that's what. While Phil Coulson struggles with his new problem, Maria Hill deals with her old one: MODOK is up to something.