Darkness, the Hat, and the Travelers of the Books

Leila (1x10)

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Lilith appears in Gargantua's world but dimension-doors out. A nine-tailed fox spirit opens her own door into Gargantua's world; Gargantua and his troll trio charge through and find themselves in a world of rooms which link to many worlds. Meanwhile Lilith and Hazuki arrive aboard a colonization spaceship where a computer is caring for a whole cohort of children whose parents have all become "immobile" and which is itself failing and malfunctioning. A habitable planet must be found soon for the survival of the children.