An underground government facility is locked down by its A.I.-controlled computer when an alien entity travels through a dimensional portal and threatens the lives of everybody inside. An underground government facility is locked down by its A.I.-controlled computer when an alien entity travels through a dimensional portal and threatens the lives of everybody inside. An underground government facility is locked down by its A.I.-controlled computer when an alien entity travels through a dimensional portal and threatens the lives of everybody inside. An underground government facility is locked down by its A.I.-controlled computer when an alien entity travels through a dimensional portal and threatens the lives of everybody inside.