The Earthly environment is causing a vitamin deficiency in Martin. Martin needs some vitamins immediately or else he will grow weaker and weaker to the point of no return. Luckily, the vitamins he needs can be found at any pharmacy, however by prescription. Martin's illness is contagious and Tim gets it, which in turn causes Mrs. Brown, Doc Mullen and then Martin to fall asleep, with no more vitamins from Martin's stash to use. Tim has to wake them all up without Tim or Martin in particular looking at each other, as that will cause them both to fall asleep forever. With a lot of effort, they manage to do it as well as get the necessary refill of vitamins from Doc Mullen.
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