 First follow-up film to the series is 2 episodes back-to-back. In "Escape From Tomorrow", the astronauts crashland in their own future, which they discover to be ape-ruled, and they and Galen become fugitives after being tricked into escaping by the ruthless Urko. In "The Trap", Urko and Burke are trapped in an underground metro station in the ruins of a city, and must cooperate in order to escape, while Urko learns some uncomfortable truths about humans and Earth s past.