[TNG] Season 4, Episode 14: CluesRating: 3
The mysterious nature of this episode makes it compelling, but as soon as they reveal what happened the episode loses some of its charm. I don’t know what I expected to happen. I think the episode kind of lives on the eeriness of Data keeping something from the rest of the crew, and watching Picard head up the investigation into what Data might be concealing.
Read more at Memory Alpha
Notes:

Picard tries to explain to Guinan how much fun mysteries are. I wonder if that will be the theme of this episode

Instead of risking it by continuing on, they send a probe to check out the class M planet they were interested in…

But then there are a bunch of “Clues”! Crusher’s spheres have some pink moss in them that usually takes a day to grow!

Picard confronts Data because clearly he isn’t saying everything he knows, and evidence points to him tampering with stuff. Data says he’s ready to face the court martial, but he can’t say anything.

Data and an alien speaking through Troi explain what really happened. Data was just lookin’ out for the crew, ’cause these aliens don’t want any one to know of their existence.
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The aliens erase their memory and give it another shot. Hopefully they don’t leave so many “Clues” this time!
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