As the news of Sid’s death reverberates through the compound, the base begins cracking down on security on The Hill, which creates new complications for the scientists’ work. With all files and case studies on lockdown, Frank’s team is locked in an uphill battle to resolve the Implosion experiment without Sid’s expertise, leading Frank to resort to creative measures. Charlie grapples with unsettling feelings about his group. Abby starts a new chapter. An MP looks for penance for his actions.