| Michael Palin in Nigeria | — | — | — | 3 |
| Michael Palin in North Korea | — | — | — | — |
| Michael Palin's Hemingway Adventure | British Broadcasting Corporation | documentary film | 1 | 4 |
| Michael Palin's New Europe | British Broadcasting Corporation | travel documentary | 1 | 7 |
| Michael Palin: Into Iraq | — | — | — | 3 |
| Mickey Dunne | — | — | — | — |
| Micro Live | BBC Two | — | — | — |
| Microbes and Men | — | — | 1 | 6 |
| Microsoap | British Broadcasting Corporation | children's television series, sitcom | 4 | 26 |
| Mid Morning Matters with Alan Partridge | — | sitcom | 2 | 12 |
| Middle Classes: Their Rise and Sprawl | BBC Two | — | 1 | 6 |
| Midnight Man | — | thriller television series | — | 3 |
| Midsomer Murders | ITV | detective television series, drama television series, mystery television series | 26 | 148 |
| Midwinter of the Spirit | — | — | 1 | 3 |
| Mighty Moshin' Emo Rangers | MTV | — | 2 | 9 |
| Mighty Truck of Stuff | CBBC | — | 2 | 6 |
| Mike and Angelo | ITV | science fiction television series | 12 | 123 |
| Mike Bassett: Manager | ITV | sitcom | 1 | 6 |
| Mike Brewer's World of Cars | Discovery Channel | reality television | — | — |
| Mile High | — | soap opera | 2 | 39 |
| Mill of Secrets | — | drama television series | — | — |
| Millie Inbetween | CBBC | — | 3 | 26 |
| Millie Inbetween: Access All Areas | BBC Children's and Education | — | — | — |
| Million 2 One | — | — | 1 | 10 |
| Million Dollar Traders | BBC Two | reality television | 1 | 3 |
| Million Pound Property Experiment | — | — | — | — |
| Millionaires Mansions | — | — | — | — |
| Mind Your Language | ITV | sitcom | 4 | 42 |
| Mind, Body & Kick Ass Moves | BBC Three | documentary film | 1 | 10 |
| Minder | ITV | drama television series | 10 | 108 |
| Minipops | Channel 4 | — | 1 | 6 |
| Miracles Take Longer | — | — | 1 | 36 |
| Miranda | BBC Two | sitcom | 3 | 20 |
| Misbehaving Mums To Be | — | — | — | 7 |
| Misfits | E4 | science fiction television series, drama television series, comedy drama, coming-of-age television program, raunchy comedy television program | 5 | 37 |
| Miss Austen | BBC One, PBS | period drama film, historical drama | 1 | 4 |
| Miss Jones and Son | ITV | sitcom | 2 | 12 |
| Miss Marie Lloyd: Queen of the Music Hall | — | — | — | — |
| Miss Marple | BBC One, British Broadcasting Corporation | detective television series | 1 | 12 |
| Miss Morison's Ghosts | — | — | — | — |
| Miss Naked Beauty | — | reality television | 1 | 6 |
| Miss Scarlet | Alibi, PBS | crime television series, historical drama, mystery television series | 6 | 36 |
| Miss Spider's Sunny Patch Friends | Cartoon Network, Nickelodeon | children's television series | 3 | 65 |
| Missing | BBC One | factual television program | 8 | 24 |
| Missing | BBC One | crime film | 2 | 15 |
| Missing | — | — | 1 | 2 |
| Missing You | Netflix | thriller television series | 1 | 5 |
| Mission Africa | BBC One | reality television | 1 | 12 |
| Mission Selfie | — | — | — | — |
| Mission: 2110 | BBC Children's and Education | — | 2 | 26 |
| Mister Charlesworth | — | — | — | — |
| Mister Maker | CBeebies | children's television series | 3 | 60 |
| Mister Maker Around the World | CBeebies | — | — | — |
| Mister Maker Comes to Town | CBeebies | children's television series | 2 | 51 |
| Mistresses | BBC One | drama television series, LGBT-related television series | 3 | 16 |
| Mitchell and Webb Are Not Helping | Channel 4 | — | 1 | 6 |
| Mixed Bill | — | — | — | — |
| Mixed Blessings | ITV | sitcom | 3 | 22 |
| Mixmasters | — | — | — | — |
| Mobil 1 The Grid | Channel 4 | — | 5 | 194 |