Let That Be Your Last Battlefield
episode of Star Trek: The Original Series (S3 E15)

"Let That Be Your Last Battlefield" is the fifteenth episode of the third season of the original American science fiction television show Star Trek. Written by Oliver Crawford (based on a story by Gene L. Coon, writing under his pen name "Lee Cronin") and directed by Jud Taylor, it was first broadcast January 10, 1969.
In the episode, the Enterprise encounters two survivors of a war-torn planet, each half black and half white (though on opposite sides from each other), each committed to destroying the other.
The episode guest-stars Lou Antonio and Frank Gorshin.
Plot
The Federation starship Enterprise is on a mission to help decontaminate the polluted atmosphere of the planet Ariannus, when sensors detect a Federation shuttlecraft that was reported stolen. The craft is brought aboard along with its alien pilot, who identifies himself as Lokai, a political refugee from the planet Cheron. Lokai's most striking feature is that his skin is ink-black on one side of his body and chalk-white on the other.
Shortly thereafter, sensors detect another spacecraft in pursuit of the Enterprise. The alien craft disintegrates, but not before its pilot, Bele, transports to the Enterprise bridge. He is colored black and white, similar to Lokai.
This brief starts where responsible research should: with the source description of “Let That Be Your Last Battlefield” as episode of Star Trek: The Original Series (S3 E15). Everything that follows is an evidence route, not borrowed authority.
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Named sources, stable identifiers and responsible institutions provide the strongest route from overview to verifiable evidence. The source revision retrieved here is dated Jun 24, 2026. The linked authority identifier is Q3562193. 2 of 3 selected statements include explicit references; 2 carry qualifiers and 1 use preferred rank. The first chronological checks are 1969.
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This entry incorporates text from “Let That Be Your Last Battlefield” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.