| Clue | Source | Date |
|---|---|---|
| 1999 science fiction novel by Robert J Sawyer | Mirror Quiz | 01 Jun 2025 |
| Narrative device that peeks at the future ... and a hint to the start of 20-, 31-, and 48-Across | LA Times Daily | 15 Oct 2019 |
| Narrative device that peeks at the future ... and a hint to the start of 20-, 31-, and 48-Across | The Washington Post | 15 Oct 2019 |
| Narrative device that peeks at the future ... and a hint to the start of 20-, 31-, and 48-Across |