| PREVIOUS | TIMELINE | NEXT |
|---|---|---|
| 31st century | 668th century | Distant future |
- 66700s
- 66710s
- 66720s
- 66730s
- 66740s
- 66750s
- 66760s
- 66770s
- 66780s
- 66790s
External links
- 668th century article at Memory Alpha, the canon Star Trek wiki.
- 668th century article at Memory Beta, the non-canon Star Trek wiki.
- 668th century article at Star Trek Expanded Universe.