| Mr Justice Duncannon | BBC One | sitcom | 1 | 6 |
| Mr Loverman | BBC One | LGBT-related television series | — | — |
| Mr Majeika | Television South | — | — | 19 |
| Mr Moon | — | — | — | — |
| Mr Selfridge | ITV | drama television series, drama film | 4 | 40 |
| Mr. and Mrs. | ITV | game show | — | — |
| Mr. Bean | ITV | sitcom, physical comedy, family film, comedy film | 6 | 14 |
| Mr. Big | — | — | — | — |
| Mr. Bigstuff | — | — | — | — |
| Mr. Crabtree Goes Fishing | — | — | — | — |
| Mr. Digby Darling | — | — | — | — |
| Mr. Men and Little Miss | ITV | animation | 3 | 104 |
| Mr. Palfrey of Westminster | ITV | drama television series | 2 | 10 |
| Mr. Sloane | Sky Atlantic | comedy | 1 | 6 |
| Mrs Biggs | ITV | drama television series | 1 | 5 |
| Mrs Merton and Malcolm | BBC One | sitcom | 1 | 6 |
| Mrs Sidhu Investigates | Acorn TV | — | 1 | 4 |
| Mrs Thursday | — | — | — | — |
| Mrs Wilson | BBC One | drama | 1 | 3 |
| Mrs. Brown's Boys | RTÉ One | sitcom, LGBT-related television series | 3 | 41 |
| Mud, Sweat and Tears: Premiership Rugby | Amazon Prime Video | — | 1 | 2 |
| Mulberry | BBC One | sitcom | 2 | 13 |
| Multi-Coloured Swap Shop | BBC One | — | 6 | 146 |
| Mum's on Strike | ITV | — | — | — |
| Murder | BBC Two | — | 1 | 4 |
| Murder | British Broadcasting Corporation | — | — | 4 |
| Murder 24/7 | BBC Two | true crime, documentary television program | — | — |
| Murder Before Evensong | Acorn TV, Channel 5 | crime television series | 1 | 6 |
| Murder City | ITV | drama television series | 2 | 10 |
| Murder in Eden | BBC One | — | 1 | 3 |
| Murder in Mind | BBC One | anthology series, drama television series | 3 | 23 |
| Murder in Provence | — | — | — | — |
| Murder in Suburbia | ITV | drama television series | 2 | 12 |
| Murder in Successville | BBC Three | — | 3 | 18 |
| Murder Investigation Team | ITV | drama television series | 2 | 12 |
| Murder Is Easy | — | mystery fiction, thriller | 1 | 2 |
| Murder Maps | — | docudrama | — | — |
| Murder Most Horrid | BBC Two | anthology series, comedy television series | 4 | 24 |
| Murder Prevention | Channel 5 | drama television series | 1 | 6 |
| Murder Rooms: Mysteries of the Real Sherlock Holmes | BBC Two | detective fiction, drama television series | 1 | 6 |
| Murder Squad | — | documentary television program | 3 | 12 |
| Murder, Mystery, and My Family | — | — | — | — |
| Murder, They Hope | Gold | whodunit, comedy drama, detective fiction | 2 | 6 |
| Murder: First on Scene | CBS Reality | — | — | 10 |
| Murderland | ITV1 | drama television series | 1 | 3 |
| Murphy's Law | BBC One | — | 5 | 23 |
| Murphy's Mob | ITV | — | — | 54 |
| Murun Buchstansangur | Channel 4 | — | — | 52 |
| Museum | — | documentary film | — | — |
| Museum of Life | BBC Two | nature documentary | — | 6 |
| Music Room | — | — | 1 | 8 |
| Music Time | — | — | — | — |
| Muslims Like Us | — | — | — | — |
| Mutual Friends | BBC One | comedy drama | 1 | 6 |
| My Almost Famous Family | — | — | 1 | 11 |
| My Brother's Keeper | — | — | — | — |
| My Cousin Rachel | — | — | — | — |
| My Family | BBC One | sitcom | 11 | 120 |
| My Family and Other Animals | — | — | — | — |
| My Famous Family | — | — | — | — |