| Clue | Source | Date |
|---|---|---|
| TV ratings system | Premier Sunday | 07 Jun 2020 |
| Numbers of concern to showrunners | New York Times | 17 May 2020 |
| Numbers that might end a series? | The New Yorker | 14 Jan 2019 |
| TV figures | ||
| TV producer's concern | ||
| Much-followed ratings, with "the" | ||
| Much-followed ratings, with "the" | ||
| Programmer's concern | ||
| Viewing audience estimates | ||
| TV ratings | ||
| Television measurement |