Stardates are Star Trek's equivalent of a calendar system. In the original series, Stardates were not well defined. They were not assigned in production order and they were not assigned in airing order. Although they appear to have been assigned randomly, they were probably assigned in the order in which they were written.

When Star Trek, The Next Generation went on the air, they had decided that 1,000 "stardates" in the Star Trek world would be one television season in the real world. But they still had problems getting episodes to air in stardate order. By the second season however, they had their act together.

The original series did a good job of assigning episodes a stardate. 93.7% of all original series episodes have a stardate assigned to them. The Next Generation beat them with 97.2% of episodes having a stardate. After that, things go down hill. Deep Space 9 only gave stardates to 35.6% of their episodes. Voyager did better with 64.9% of their episodes getting stardates.

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Q: How many Star Trek episode's do we get a year?

A: Below is a chart showing the number of Star Trek episodes we get every television season. The 1996-1997 television season was the best with a total of 52 episodes aired. 1988-1989 was the worst, only 22 episodes (there was a writers strike that season that effected then number of episodes they were able to produce).

Episodes by Year:

Total Episodes:

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Q: Why does Tasha Yar continue to appear in episodes after she dies?

A: Tasha dies on stardate 41601.3 yet she continues to appear in episodes up to the end of the season. This happens because there were many errors assigning stardates in the first season of The Next Generation. When the show originally aired, she did not appear in any episodes that aired after her death, but, when the episodes are sorted by stardate, she's resurrected.

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Q: Why are there two Voyager episodes between Year Of Hell, Part I and Year Of Hell, Part II?

A: (SPOILER ALERT) "Year of Hell" involves time travel. At the end of Part II, actions are taken that undo all of the "Year of Hell". Essentially, the episodes never happened; the two episodes between Parts I and II happen instead.

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