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Steve is exposed to spores from a poisonous toadstool and so becomes violently paranoid. Thinking the others are trying to turn him over to the SID, he lures them away one by one from the ship and ties them up inside a vent. Meanwhile, Inspector Kobick, knowing Steve has been exposed to the mushroom, expects the human to turn on his friends. He radios Steve with a deal to turn in those he captured and he shall help him get back to Earth. After Dan sees Mark and then Chipper come in contact with the mushroom, he experiences its hallucinatory effects and realizes Steve has been drugged. 

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