| Z-Cars | British Broadcasting Corporation | police procedural, drama television series | 12 | 801 |
| Zapped | — | sitcom | 1 | 3 |
| Zastrozzi, A Romance | — | — | — | 4 |
| Zen | BBC One | drama television series | 1 | 3 |
| Zero Chill | Netflix | teen drama television | 1 | 10 |
| Zero Hour | History, Discovery Channel, British Broadcasting Corporation | documentary film, documentary television program, docudrama | 3 | 16 |
| Zero One | BBC One | — | 3 | 39 |
| Zig and Zag | BBC Children's and Education | — | 1 | 26 |
| ZingZillas | France 5 | — | 2 | 52 |
| Zodiac | — | — | 1 | 6 |
| Zokko! | British Broadcasting Corporation | — | — | 26 |
| Zoo Quest | British Broadcasting Corporation | nature documentary | 7 | 42 |
| Zoo Vet at Large | — | documentary film, documentary television program | — | — |