With Graham in need of repairs, Vidaux and Mayuka head into the city to get a specialized mechanic while Derrida and Yuri stay behind and spend a night at an abandoned house. While waiting for repairs, Derrida and Yuri discuss the Trout Theory about time rides that Derrida wrote for his graduate thesis. Derrida looks at the pictures in Yuri's camera when he time rides into the moment he and Nathan tried to escape. From this, he deduces that vivid memories trigger the time ride...