[TNG] Season 3, Episode 22: The Most Toys
The Most Toys feels a lot like an original series episode. The broad strokes of the plot are pretty familiar, but the reason we like “The Most Toys” if for how it showcases Data. The way Data reacts to captivity is handled really well, and the end provides an intriguing glimpse into the nuances of his character.
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Read more at Memory Alpha
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Notes:

This guy collects extremely rare and valuable things, like this weird sock puppet. Data is now part of his collection.

The guy really wants Data to wear different clothes, but Data refuses, so he throws some kind of acid on Data that will burn up the uniform.

He brings a friend to see Data because he wants to show off. The friend has metal all over his face. I think it’s to race micro machines

Enterprise delivers the unstable material in order to stop a contamination. They find evidence that the contamination was artificially created.
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