| Clarkson's Car Years | BBC Two | documentary film | — | 6 |
| Class | BBC Three | science fiction television series, LGBT-related television series | 1 | 8 |
| Class | — | — | — | — |
| Class Dismissed | BBC Children's and Education | — | 2 | 24 |
| Classic Albums | — | documentary television program | — | 45 |
| Classic Car Garage | — | documentary television program | — | — |
| Classroom Chaos | — | documentary film, documentary television program | — | — |
| Cleaning Up | ITV1 | drama television series | 1 | 6 |
| Cleddau | S4C | thriller television series, drama television series, mystery television series | 1 | 6 |
| Cleverdicks | Sky Atlantic | game show | 1 | 30 |
| Click | BBC News, BBC News, BBC Two | technology journalism | — | 895 |
| Clifford's Puppy Days | PBS Kids, CBeebies, Tiny Pop, France 5, Pogo, PBS | — | 3 | 63 |
| Climate Change – The Facts | BBC One | — | — | — |
| Climbing Great Buildings | BBC Two | documentary film | 1 | 15 |
| Clink | — | LGBT-related television series | — | — |
| Clique | BBC Three, BBC iPlayer | thriller television series | 2 | 12 |
| Clive Barker's A-Z of Horror | — | documentary film | — | — |
| Clochemerle | British Broadcasting Corporation | comedy television series | 1 | 9 |
| Clone | BBC Three, British Broadcasting Corporation | sitcom, science fiction television series | 1 | 6 |
| Close and True | — | — | — | 6 |
| Close to Home | ITV | sitcom | 2 | 19 |
| Close to Me | — | — | — | — |
| Close to the Edge | — | reality television | — | — |
| Clothes-Line | — | documentary film, documentary television program | — | — |
| Cloud Burst | — | — | — | — |
| Cloudbabies | CBeebies | — | 1 | 52 |
| Club High School Musical: Make It Happen | Disney Channel | reality television | 1 | — |
| Club Reps | ITV | reality television | 3 | 36 |
| Club X | — | — | — | — |
| Cluedo | ITV | game show | 4 | — |
| Cluff | BBC One | — | 2 | 19 |
| Clutter Nutters | CBBC | — | 1 | 15 |
| Coach Trip | Channel 4 | — | — | — |
| Coalition | Channel 4 | drama film | — | 1 |
| Coast | BBC Two | documentary film | 10 | 75 |
| Coast vs Country | — | — | 2 | 70 |
| Coastal Railways with Julie Walters | — | — | — | 4 |
| Coasting | — | — | — | — |
| COBRA | — | — | — | — |
| Cockles | — | — | — | — |
| Cockleshell Bay | ITV | — | — | 104 |
| Cocktail Kings | Discovery Channel | reality television | — | — |
| Code 404 | — | — | — | — |
| Code of a Killer | ITV | drama television series | 1 | 2 |
| Code of Silence | ITVX | crime television series, drama television series | 1 | 6 |
| Code XIII | — | — | — | — |
| Codename | BBC Two | — | 1 | 13 |
| Codename Icarus | — | — | — | — |
| Codename: Kyril | — | drama television series | — | — |
| Codex | Channel 4 | game show | 2 | 12 |
| Cold Blood | — | drama television series | 3 | 5 |
| Cold Call | — | — | — | — |
| Cold Courage | — | thriller television series | — | — |
| Cold Feet | ITV | comedy drama, drama television series, romantic television drama | 9 | 60 |
| Cold Lazarus | Channel 4 | science fiction television series | — | 4 |
| Cold Warrior | — | — | — | 8 |
| Colditz | British Broadcasting Corporation | drama television series | 2 | 28 |
| Coldwater | ITV1 | — | — | 6 |
| Colin's Sandwich | BBC Two | sitcom | 2 | 12 |
| Collateral | Netflix, BBC Two | drama television series, thriller television series | 1 | 4 |