7/25 Nina and her experimenters investigate fire and what it needs to burn.
8/25 Nina and her experimenters visit an ice-cream factory to learn about soap and grease.
6/26 Grandpa tries to lend a helping hand to Miss Smiley's cafe when a taste tester arrives. (R)
7/26 Jason and Grandpa build a beautiful castle for the Sunnysands sandcastle competition. (R)
3/25 Some naughty goats are eating Trevor the troll's beautiful roses. (R)
3/50 Yojojo and Nok Tok find a hollowed-out branch that looks like a trumpet. (R)
14/52 Perky becomes obsessed with buying things on the internet, and lands himself in debt. (R)
10/52 Perky says that one of his many loyal fans is now his girlfriend! But who is she, exactly? (R)
3/13 Magic, a miniature horse in Hawaii, gives children their first ever pony ride.
13/52 Sam and Mark host as another two families battle it out in a range of hilarious games. (R)
14/52 Sam and Mark host as another two families battle it out in a range of hilarious games. (R)
9/23 Dylan Towser has world peace in his grasp with his missile disarmer. (R)
1/15 Dr Jonathan Foyle's journey begins in the North East of England at Durham Cathedral. (R)
2/15 The next step of Jonathan's journey takes him to Lincoln Cathedral, built in 1183. (R)
Bettany Hughes shows how the legend of Atlantis was inspired by a real historical event. (R)
2/7 James May makes a rare visit to the Top Gear track to test a pair of Porsches. (R)
The Dragons hear pitches including canine shades and a comfy caravan product.
1/6 Julia Bradbury takes a walk along the Monsal Trail in Derbyshire's Peak District. (R)
Can Thailand deliver justice to the victims of army violence?
3/4 A look at some of the largest and most elaborate maps ever produced.
Highlights from the set by Elbow from the Pyramid Stage at the 2011 festival. (R)
Highlights of U2's Friday headlining slot at Worthy Farm. (R)
Monday 8 August 2011