"S.O.S." is the twenty-first and twenty-second episodes and two-part season finale 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 fight a group of Inhumans. It is set in the Marvel Cinematic Universe (MCU), sharing continuity with the films of the franchise. The first part was written by Jeffrey Bell and directed by Vincent Misiano. Part two was written by Jed Whedon and Maurissa Tancheroen, and directed by Billy Gierhart.