| Kung Fu Dino Posse | October 2, 2010 | KBS 1TV | 40 |
| Lavender Castle | January 7, 1999 | ITV | 26 |
| Learning Time with Timmy | May 24, 2018 | — | 27 |
| Legend of the Dragon | July 29, 2005 | BBC Children's and Education | 39 |
| Lilly the Witch | September 4, 2004 | CBBC | 52 |
| Lily's Driftwood Bay | May 5, 2014 | Nick Jr. | 100 |
| Little Monsters | September 14, 1998 | BBC One | 52 |
| Little Princess | October 9, 2006 | Channel 5, Milkshake! | 135 |
| Little Red Tractor | January 5, 2004 | Nickelodeon | 75 |
| Little Robots | January 7, 2003 | CBeebies | 65 |
| Ludwig | — | — | — |
| Luo Bao Bei | — | — | 52 |
| Maisy | February 11, 1999 | CITV | 28 |
| Make Way for Noddy | September 2, 2002 | PBS, PBS Kids | 100 |
| Mama Mirabelle's Home Movies | September 8, 2007 | CBeebies | 104 |
| Mary, Mungo and Midge | October 7, 1969 | BBC One | 13 |
| Matt Hatter Chronicles | October 31, 2011 | CITV | 52 |
| MechaNick | October 5, 2003 | ITV | 32 |
| Meekah | 2022 | — | 66 |
| Merlin the Magical Puppy | — | — | — |
| Metalheads | September 1, 2003 | — | 26 |
| Midnight Patrol: Adventures in the Dream Zone | September 1, 1990 | British Broadcasting Corporation | 13 |
| Mighty Max | September 12, 1993 | Broadcast syndication | 40 |
| Mike the Knight | September 8, 2011 | Treehouse TV | 128 |
| Milo | 2021 | — | — |
| Molang | January 2, 2016 | Disney Jr. | 306 |
| Monster Allergy | December 19, 2005 | ZDF, BBC One, Antena 3, Cartoon Network, Rai 2, YTV, M6 | 26 |
| Moominvalley | 2019 | Yle | 26 |
| Mr Benn | January 7, 1971 | — | 14 |
| Mr. Bean: The Animated Series | January 5, 2002 | ITV1 | 130 |
| Muddle Earth | March 15, 2010 | CBBC | 26 |
| My Robot & I | October 15, 2024 | BabyTV | 20 |
| Nate Is Late | 2018 | Super RTL, Nine Network | 156 |
| Nellie the Elephant | January 8, 1990 | ITV1 | 30 |
| New Captain Scarlet | February 12, 2005 | ITV | 26 |
| Nigel and Marmalade | — | — | — |
| Noah's Island | September 29, 1997 | BBC One | 39 |
| Noddy, Toyland Detective | March 26, 2016 | Super RTL, France 5, Universal Kids, Milkshake! | 52 |
| Numberblocks | January 23, 2017 | CBeebies | 90 |
| Octonauts | September 16, 2010 | British Broadcasting Corporation, CBeebies | 133 |
| Octonauts: Above & Beyond | September 7, 2021 | Netflix | 13 |
| Oddbods | 2013 | Disney Channel Asia | 260 |
| Olive the Ostrich | 2011 | Nick Jr. Channel | 104 |
| Olivia | January 24, 2009 | Nick Jr. | 37 |
| Om Nom Stories | — | Rovio Entertainment, CITV | 39 |
| Operavox | — | — | 6 |
| Pablo the Little Red Fox | September 28, 1999 | CBeebies | 52 |
| Paddington | January 5, 1976 | British Broadcasting Corporation, BBC Children's and Education | 56 |
| Paddington Bear | December 2, 1989 | Broadcast syndication | 13 |
| Peppa Pig | May 31, 2004 | Channel 5, Nick Jr. Channel, MediaCorp Channel 5 | 394 |
| Peter Rabbit | December 14, 2012 | France 5 | 51 |
| Philbert Frog | September 24, 1993 | BBC Children's and Education | 13 |
| Pingu | March 7, 1990 | Schweizer Fernsehen, CBeebies, TV Brasil, BBC Children's and Education, Disney Channel, TV Cultura, Disney Jr., Nick Jr. Brasil, Gloobinho | 157 |
| Pingwings | — | — | — |
| Pinkalicious & Peterrific | February 19, 2018 | PBS Kids | 81 |
| Pinny's House | — | — | — |
| Piripenguins | May 19, 2025 | CBBC, CBeebies | — |
| PJ Masks | September 18, 2015 | Disney Channel, Disney Jr. | 151 |
| Planet Cosmo | — | — | — |
| Planet Sketch | September 10, 2005 | — | 40 |