| Wire in the Blood | ITV1 | 6 | 24 |
| Wish Me Luck | ITV | 3 | 23 |
| Within These Walls | London Weekend Television | 5 | 72 |
| Witness Number 3 | Channel 5 | — | — |
| Wives and Daughters | BBC One | 1 | 4 |
| Wolf Hall: The Mirror and the Light | BBC Two | 1 | 6 |
| Wonderful You | ITV | 1 | 7 |
| World on Fire | BBC One | 2 | 13 |
| Worzel Gummidge | BBC One | 1 | 2 |
| Yesterday's Dreams | ITV | 1 | 7 |
| You Are Here | BBC One, Starz | — | 8 |
| You Can't Win | ITV | 1 | 7 |
| Z-Cars | British Broadcasting Corporation | 12 | 801 |
| Zen | BBC One | 1 | 3 |