A mysterious code underpins the world. What does it mean and what can we learn from it? (R)
Titch and Ted get themselves into all sorts of trouble with their new boss Mr Pie.
Titch and Ted complete a series of odd jobs, learning all about fractions as they go.
Titch and Ted learn about geometry on their day out at the beach.
4/25 King Teddington would like some peas to be delivered to his castle. (R)
9/51 On a windy day Bob finds a floating feather and invents a new game. (R)
33/52 Brewster invents a fun tour for visitors, to get his Show and Tell badge. (R)
25/50 The Octonauts share a few fun facts about the sea star. (R)
14/52 It's hard to keep the beautiful sculpture of Funella safe from the residents at the hotel. (R)
25/39 Charley learns that showing off can be risky, especially when there's a shark involved! (R)
The Tweenies learn that pinching people is naughty, it can hurt and you shouldn't do it. (R)
10/26 After pretending to need help, Raa Raa finds himself in trouble for real. (R)
22/78 Coco and Bing both need a crown to complete their outfits, but there is only one. (R)
20/26 The Alphablocks play hide-and-seek. (R)
22/25 Justin and his friends are having fun at the beach, while Mr Tumble is making a telephone! (R)
11/26 Giuseppe and Anna-Rose live near the seaside. They love to go there with their families. (R)
6/26 The flamingos go to Flamingo Bingo, so the Numpups agree to babysit the flamingos' eggs. (R)
7/26 The Small Potatoes hop on board the Potato Train and chug through town. (R)
3/26 The wildebeest eat so much grass that the other animals decide to do something about it. (R)
39/50 Nok Tok wants to cloud gaze, but the other Piplings ask him to mend things for them. (R)
19/26 Muffin wants to play Mummy, and Mr Beakman agrees to play with her. (R)
21/32 Donna stands up to things that are a little bit scary! (R)
19/63 Edie McCredie arrives in the nursery complaining about strange road signs. (R)
7/22 The Octonauts must stop a huge herd of sea pigs before they fall into the Mariana Trench. (R)
21/25 Nina investigates how coal was made - with the help of Ollie, her smell neuron. (R)
3/10 Bellag learns different shapes and helps Caoilte Coinín choose new wheels for his chariot.
31/52 Hugo knows lots of people who are clever, like his parents and his friend the scientist. (R)
11/26 When Abney and Teal have a snooze, they don't wake up where they expect. (R)
10/50 Nok Tok tries to share his three fir cones with Lau Lau, but he can't divide them equally. (R)
32/100 The Tombliboos explore inside their house, which is full of interesting spaces. (R)
Floella Benjamin reads Baby Badger's Wonderful Night, by Karen Saunders. (R)
3/18 Gaelic for beginners presented by Rhoda MacDonald. (R)
Professor Brian Cox witnesses the wonders of the universe in 12 short films. (R)