| Year | Event | ||||||
| 5 billion bc | |||||||
| 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]
| ||||||
| 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]
|
| Canon source | Backstage source | Novel source | DITL speculation |
| # | 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 |
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