HOMICRON, a NASA physicist whose body is inhabited by a powerful alien. STARLOCK, the former servant of awesome cosmic entities, now a fugitive. FUTURAm a mysterious woman from another dimension. JALEB, the secretive agent of a race of telepaths. JAYDEE, the deadliest killing machine in the universe. These are the STRANGERS, brought together by TANKA, an "invariant" empowered by an unfathomably distant future to safeguard our world.