Official UK Terrestrial TV Viewing Figures for The X-Files, Series 4
| EPISODE | DATE | VIEWERS | NOTES |
| Herrenvolk | 10/09/97 | ? < 7.64 M | |
| Home | 17/09/97 | ? < 7.62 M | |
| Teliko | 24/09/97 | ? < 7.92 M | |
| Unruhe | 01/10/97 | ? < 7.35 M | |
| The Field Where I Died | 08/10/97 | ? < 7.94 M | |
| Sanguinarium | 15/10/97 | ? < 8.27 M | |
| Musings of a Cigarette Smoking Man | 22/10/97 | ? < 7.71 M | |
| Tunguska | 29/10/97 | ? < 8.32 M | |
| Terma | 05/11/97 | ? < 9.46 M | |
| Paper Hearts | 12/11/97 | ? < 9.85 M | |
| El Mundo Gira | 19/12/97 | ? < 9.70 M | |
| Leonard Betts | 26/11/97 | ? < 10.03 M | |
| Never Again | 03/12/97 | ? < 9.68 M | |
| Memento Mori | 10/12/97 | ? | |
| Kaddish | 17/12/97 | ? | |
| Unrequited | 07/01/98 | ? < 10.50 M | |
| Tempus Fugit | 14/01/98 | ? < 10.11 M | |
| Max | 21/01/98 | ? < 9.94 M | |
| Synchrony | 28/01/98 | ? < 9.52 M | |
| Small Potatoes | 04/02/98 | ? < 9.90 M | |
| Zero Sum | 11/02/98 | ? < 9.22 M | |
| Elegy | 18/02/98 | ? < 9.27 M | |
| Demons | 25/02/98 | ? < 9.38 M | |
| Gethsemane | 04/03/98 | ? < 8.79 M |
| Screenings are for BBC1, unless stated otherwise. | ||
| Highest: | < 10.50 Million | ? |
| Average: | No data available | |
| Lowest : | < 7.35 Million | ? |
The X-Figures: UK Viewing Figures
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