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The City on the Edge of Forever

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Prime Timeline

Year Event
5 billion bc
Picture from -5000000000 ● [1] The Guardian of Forever was asked its last question prior to 2267. [2]
1930
Picture from 1930 ● [3] Edith Keeler is killed in a road traffic accident. In an alternate timeline Keeler is saved by Dr. McCoy, thrown into the past by the Guardian of Forever. She goes on to become a person of great importance, using her influence to keep the USA out of World War II. This gives the Germans the time to develop atomic weapons and enables them to conquer the world. [3]
  People :  Edith Keeler, Leonard H. McCoy, James T. Kirk
  Species :  Humans
2267
Picture from 2267 ● [4] The Enterprise detects time distortions emanating from an uninhabited planet. Investigating, they discover that the effect is being caused by an ancient artefact on the planet, a remnant of a long-vanished civilisation. McCoy, suffering the effects of an accidental drug overdose, travels to 1930s Earth via the portal, disrupting Earth's history. Kirk and Spock are able to use the device to travel back and correct the damage. [4]
  People :  James T. Kirk, Leonard H. McCoy, Spock, Edith Keeler

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 The City on the Edge of Forever The Guardian said it had been waiting for a question since "before your sun burned hot in space", indicating a time of at least five billion years ago
2 TOS 1 The City on the Edge of Forever The Guardian said it had been waiting for a question since "before your sun burned hot in space", indicating a time of at least five billion years ago
3 TOS 1 The City on the Edge of Forever Keeler tells Kirk the year
4 TOS 1 The City on the Edge of Forever
Series : TOS Season 1
Episode : The City on the Edge of Forever
Comment : The Guardian said it had been waiting for a question since "before your sun burned hot in space", indicating a time of at least five billion years ago
Series : TOS Season 1
Episode : The City on the Edge of Forever
Comment : The Guardian said it had been waiting for a question since "before your sun burned hot in space", indicating a time of at least five billion years ago
Series : TOS Season 1
Episode : The City on the Edge of Forever
Comment : Keeler tells Kirk the year
Series : TOS Season 1
Episode : The City on the Edge of Forever

© Graham & Ian Kennedy Page views : 14,529 Last updated : 24 Oct 2025