Related Clues:
- Existing only in memory
- Like history
- "Back to the Future" destination
- Broke off, as a relationship
- Film noir classic, "Out of the ___"
- One of the tenses
- Background
- Tense time?
- Time you can't relive
- A thing of the past
- Long-ago period
- Didn't continue
- Ancient history
- It's behind us
- Time traveler's destination, at least half the time