Balance of Terror

Prime Timeline

Year

Event

2266

● [1] The USS Enterprise engages in a prolonged battle with a Romulan bird of Prey which has crossed the Neutral Zone and attacked several Federation outposts. During the battle it is discovered for the first time that the Romulans are descended from the Vulcans who left their planet when Surak's teachings of total logic began to gain widespread support. [1]   People :  James T. Kirk, Spock, Leonard H. McCoy, Montgomery Scott, Hikaru Sulu, Nyota Uhura, Pavel A. Chekov, Christine Chapel, Janice Rand   Species :  Romulans, Humans

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Colour key

Canon source

Backstage source

Novel source

DITL speculation

● - Shows the canon status and reference of the year for this event

References

#	Series	Season	Source	Comment
1	TOS	1	Balance of Terror

Series :	TOS Season 1
Episode :	Balance of Terror

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© Graham & Ian Kennedy

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Last updated : 4 Nov 2025