Plot holes: Denab shuts the cage door behind Martin to trap him in with the huge animals they are breeding, then later opens the cage to let Martin back in, asking him, "Don't you think you would feel more at ease on this side of the cage?" But both before he shuts Martin out, and after he lets him back in, the cage door is wide open - leaving the Astron-Deltans themselves at risk of being attacked by their giant insects and animals.
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