Data is sent to follow a probe that has drifted off course and crashed on a primitive planet, only to crash on the planet, himself, with no memory of any event prior to crashing on the planet's surface.



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Episode cast overview:
Ronnie Claire Edwards ...
Kimberly Cullum ...
Skoran (as Michael G. Hagerty)
Andrew Benne ...
Apprentice (as Andy Kossin)
Rainer (as Richard Ortega-Miro)


During a mission to repair a probe which crashed on a planet with a Renaissance culture, an explosion damages Data bad enough to cause amnesia. He is taken in by villager Garvin and his arrogant wife, a teacher who puts him in her class. Before she's convinced of Data's scientific superiority by experiments, the nuclear material he carried has caused radiation sickness. Meanwhile Deanna decides to take her bridge officer exams, supervised by Riker, but keeps failing the engineering emergency test- or is it really something else? Written by KGF Vissers

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Release Date:

12 February 1994 (USA)  »

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Sound Mix:


Aspect Ratio:

1.33 : 1
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Did You Know?


The title refers to a quote from William Shakespeare's Hamlet: "This above all: to thine own self be true, And it must follow, as the night the day, Thou canst not then be false to any man. Farewell, my blessing season this in thee!" See more »


When Data puts down the anvil, it keeps rocking on the uneven ground for a short while, showing that the anvil is in fact very light. See more »


Garvin: Mr. Radioactive.
[Garvin's suggestion on how to call Data]
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References Frankenstein (1931) See more »


Star Trek: The Next Generation End Credits
Composed by Jerry Goldsmith and Alexander Courage
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User Reviews

Lost Data.
6 December 2014 | by (Bradenton, Florida) – See all my reviews

When this episode begins, Data is on some planet collecting parts of a radioactive probe that landed there. He is sure to avoid the locals, as they are, roughly, at about the medieval/renaissance level in their development. However, when he is injured, Data cannot remember who he is and eventually he wanders into town. The locals, however, cannot conceive of anyone not from their world and instead of freaking out at this weird being, they just assume he's 'from the north'. Unfortunately, Data is also carrying radioactive material and the locals begin passing the metal around--with alarming consequences.

At the same time this is occurring, Troi is on the Enterprise trying to improve her skills and become a bridge officer. However, her 'niceness' mind be a serious impairment, as sometimes a captain needs to make decisions that can kill.

I didn't particularly care much about the Troi plot. This isn't to say it was bad, but the Data loss part of the show was much more compelling. Overall, despite the show running seven seasons, this is a very good program--and even though Picard (Patrick Stewart) was barely in the show.

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