| Year | Event |
| 2267 |
● [1]
Whilst charting an unexplored planet the Enterprise encounters Lazarus, a man who is being plagued by a version of himself from a mirror antimatter universe. The two Lazarus' are ultimately consigned to an inter-dimensional void, where they will spend all eternity at one another's throats. [1]
|
| Canon source | Backstage source | Novel source | DITL speculation |
| # | Series | Season | Source | Comment |
| 1 | TOS | 1 | The Alternative Factor |
| Series : | TOS Season 1 |
| Episode : | The Alternative Factor |
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