This is a good example of a problem the series had in general. The concept of swapping beings with an alien world is a good one to explore, maybe even the basis of a series. But it blunders around with serious inconsistencies. There is almost a total lack of security at the facility. And no one is going to let an alien being just wander around looking for trouble. Earth teenagers fill that niche during summer vacation. The "bear," while initially interesting to look at, eventually looks like a human jellyfish. Silly. Henry Silva is good and that's about the only acting one can recommend from an episode that falls very short of its potential.
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