| Kate Garraway's Life Stories | — | — | 13 | — |
| KateModern | — | — | 2 | 312 |
| Katie | ITV2 | reality television | — | 40 |
| Katie Morag | CBeebies | — | 2 | 39 |
| Katy | BBC Children's and Education | — | 1 | 3 |
| Katy Brand's Big Ass Show | ITV2, ITV | — | 3 | 19 |
| Kavanagh QC | ITV | drama television series | 5 | 29 |
| Kay Burley | — | — | — | — |
| Kazuko's Karaoke Klub | — | — | — | — |
| Keep It in the Family | Thames Television | sitcom | 5 | 31 |
| Keep It in the Family | — | — | — | — |
| Keep It in the Family | ITV | game show | 2 | 13 |
| Keep Your Enemies Close | BBC Children's and Education | — | — | — |
| Keeping Up Appearances | BBC One | sitcom | 5 | 44 |
| Keiser Report | RT | — | — | — |
| Keith Lemon's LemonAid | — | — | 1 | 6 |
| Keith Lemon's Very Brilliant World Tour | ITV2 | — | 1 | 6 |
| Kelvin's Big Farming Adventure | — | — | — | — |
| Ken and Deirdre's Bedtime Stories | — | — | 1 | 10 |
| Kenilworth | — | drama television series | — | — |
| Kenneth Williams: Fantabulosa! | BBC Four | LGBT-related television series | — | 1 |
| Kerching! | BBC One | sitcom | — | 28 |
| Kerwhizz | CBeebies | — | 2 | 41 |
| Kessler | BBC One | drama television series | — | 6 |
| Kevin Bridges: What's the Story? | BBC One | — | 1 | 6 |
| Kevin McCloud's Escape to the Wild | Channel 4 | — | 1 | 4 |
| Kevin McCloud's Man Made Home | Channel 4 | documentary television program | — | 8 |
| Keynotes | ITV | game show | 5 | 205 |
| Kick Start | BBC One | — | 13 | 35 |
| Kidnap and Ransom | ITV | — | 2 | 6 |
| Kidnapped: The Chloe Ayling Story | — | — | — | 6 |
| Kids Say the Funniest Things | ITV | — | — | — |
| Kill Jackie | — | thriller | — | — |
| Killer | — | — | — | — |
| Killer Britain with Dermot Murnaghan | Crime & Investigation Network | — | 4 | 25 |
| Killer Camp | — | game show | — | — |
| Killer Couples | — | documentary television program | — | — |
| Killer Magic | BBC Three | game show | 1 | 7 |
| Killer Net | Channel 4 | thriller television series | 1 | 4 |
| Killer Ratings | Netflix | true crime | 1 | 7 |
| Killer Women with Piers Morgan | — | — | — | — |
| Killers Behind Bars: The Untold Story | — | documentary film, documentary television program | — | — |
| Killing Eve | BBC America | thriller television series, LGBT-related television series, drama film, black comedy | 4 | 32 |
| Kilroy | BBC One | talk show | — | — |
| Kim & Co | — | — | 2 | 26 |
| Kindly Leave the Kerb | — | — | — | — |
| King Alfred and the Anglo Saxons | — | documentary film | 1 | 3 |
| King and Castle | — | — | — | 12 |
| King Cinder | BBC One | — | 1 | 6 |
| King Gary | BBC One Wales | — | 2 | 13 |
| King of the Castle | ITV1 | — | 1 | 7 |
| King of the Ghetto | BBC Two | — | 1 | 4 |
| King of the Nerds | — | — | 1 | 8 |
| King of the River | BBC One | — | 1 | 17 |
| King Of... | Channel 4 | — | 1 | 4 |
| King Rollo | BBC One | — | 1 | 13 |
| King's Royal | — | — | — | — |
| Kingdom | ITV | drama television series, comedy television series | 3 | 18 |
| Kingdom | BBC One | nature documentary | — | — |
| Kingdom of Plants 3D | Sky 3D | documentary television program, nature documentary | 1 | 3 |