| The Innocence Project | British Broadcasting Corporation, BBC One | legal drama | 1 | 8 |
| The Innocents | Netflix | science fiction television series | 1 | 8 |
| The Inside Man | — | — | — | — |
| The Inspector Alleyn Mysteries | BBC One | detective fiction | 2 | 9 |
| The Inspector Lynley Mysteries | BBC One | drama television series, crime television series | 6 | 23 |
| The Interceptor | BBC One | drama film | 1 | 8 |
| The Investigator: A British Crime Story | ITV | — | 2 | 7 |
| The Invisible Man | ITV | science fiction television series, fantasy television series, drama television series | 2 | 26 |
| The Invisible Man | BBC One | science fiction television series, drama television series | 1 | 6 |
| The Iris Affair | Sky Atlantic | thriller | 1 | 8 |
| The Irish R.M. | Channel 4, S4C, RTÉ One | comedy drama | 3 | 18 |
| The Irregulars | — | crime television series, drama television series | 1 | 8 |
| The Island with Bear Grylls | Channel 4 | reality television | 4 | — |
| The IT Crowd | Channel 4 | sitcom | 4 | 25 |
| The Jack Docherty Show | Channel 5 | — | — | — |
| The Javone Prince Show | — | — | — | — |
| The Jazz Series | — | — | — | — |
| The Jeremy Kyle Show | ITV | tabloid talk show | 17 | 3,320 |
| The Jetty | BBC One | — | — | 4 |
| The Jewish Enquirer | Amazon Prime Video | comedy television series | 1 | 6 |
| The Jo Stafford Show | — | variety show | 1 | 9 |
| The Job Lot | ITV | sitcom | 3 | 18 |
| The Johnny and Inel Show | BBC Children's and Education | children's television series | 2 | 26 |
| The Joke Machine | ITV | — | 1 | 8 |
| The Jonathan Ross Show | — | talk show | 13 | 160 |
| The Joy of Teen Sex | Channel 4 | — | 2 | — |
| The Joy of Text | BBC One | documentary film | — | — |
| The Julie Andrews Hour | ITV | variety show | 1 | 24 |
| The Jump | Channel 4 | — | 4 | 24 |
| The Jump | — | — | — | — |
| The Jury | ITV | drama television series | 2 | 6 |
| The Jury: Murder Trial | — | — | — | — |
| The Justin Lee Collins Show | ITV2 | — | — | — |
| The Karen Dunbar Show | BBC One Scotland | sitcom | 4 | 22 |
| The Keith & Paddy Picture Show | — | — | — | 11 |
| The Keith Barret Show | BBC Two | comedy television series | 2 | 13 |
| The Keith Harris Show | — | — | — | — |
| The Keith Lemon Sketch Show | ITV2 | — | 2 | 12 |
| The Kennedys | BBC One | — | 1 | 6 |
| The Kenny Everett Video Show | ITV | — | 4 | 32 |
| The Kevin Bishop Show | Channel 4 | comedy television series | 2 | 12 |
| The Kids Are All Right | BBC One | game show | 1 | 8 |
| The Kids from 47A | ITV | — | 3 | 41 |
| The Killing Kind | — | — | — | — |
| The King Is Dead | BBC Three | panel game, comedy television series | 1 | 7 |
| The Kit Curran Radio Show | ITV | — | 2 | 12 |
| The Knock | ITV | drama television series | 5 | 35 |
| The KNTV Show | — | — | — | — |
| The Krankies Elektronik Komik | — | — | 3 | — |
| The Krankies Klub | ITV | — | 1 | 8 |
| The Krypton Factor | ITV | game show | 20 | 254 |
| The Kumars at No. 42 | BBC Two | comedy television series | 7 | 52 |
| The Labours of Erica | ITV | sitcom | 2 | 12 |
| The Lady | — | — | — | — |
| The Lady Is a Tramp | Channel 4 | — | — | 13 |
| The Lakes | BBC One | — | 2 | 14 |
| The Larkins | ITV | comedy drama | 2 | 13 |
| The Larkins | ITV | sitcom | 6 | 40 |
| The Last Bus | — | adventure television series, drama television series | — | — |
| The Last Chancers | — | — | — | — |