| Year | Event |
| 2267 |
● [1]
The Enterprise visits the planet Halkan to negotiate for mining rights on the planet. Whilst there a strong ion storm causes a transporter accident which swaps several officers with their counterparts from a parallel universe. The officers are able to reverse the swap, returning to the correct universe. [1]
|
| Canon source | Backstage source | Novel source | DITL speculation |
| # | Series | Season | Source | Comment |
| 1 | TOS | 2 | Mirror, Mirror |
| Series : | TOS Season 2 |
| Episode : | Mirror, Mirror |
| © Graham & Ian Kennedy | Page views : 9,354 | Last updated : 8 Nov 2003 |