Episode Information
About this episode
Errand of Mercy is season 1, episode 27 of Star Trek: The Original Series, first aired on 23 March 1967.
In series order, the previous episode is S01E26 — The Devil in the Dark and the next is S01E28 — The City on the Edge of Forever. By original air date, the previous episode is S01E26 — The Devil in the Dark and the next is S01E20 — The Alternative Factor.
Browse every episode in Season 1.
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