Professor Ben Garrod looks into why shark skin is covered in thousands of tiny teeth, how a gecko's skin allows it to defy the laws of gravity, how a crocodile can sense prey through their skin, and how the heat-sensing pit viper grabs a meal. 3/3

In Tennessee, a violent tornado touches down in downtown Nashville - interrupting a live news broadcast and raking through the city. At the Hamma Hamma Falls, a kayaker races to rescue his friend from a terrifying ordeal above a 60-foot waterfall. 5/6

Simon Reeve embarks on the second leg of his four-part journey around the Mediterranean, travelling from Cyprus, across the sea to Lebanon and on to Israel and the Gaza Strip. 2/4

The warm subtropical top of the North Island is famed for its beauty and history, and nowhere in New Zealand is the coast as vividly linked with the sea than on this peninsula. 6/6

A look at how grinders in Tim Hortons' mammoth roasting facility tackle thousands of pounds of coffee beans every hour. Also, we look out how empanadas are made on an epic scale, and the history of cocktail sauce. 1/26

This episode looks at factories producing jelly buttons, baby puree, feta cheese and baklava. 2/26

Professor Ben Garrod looks into why shark skin is covered in thousands of tiny teeth, how a gecko's skin allows it to defy the laws of gravity, how a crocodile can sense prey through their skin, and how the heat-sensing pit viper grabs a meal. 3/3

Robson Green heads to Miami for the Offshore Grand Slam, but will the weather scupper his plans? 1/10

Gallery owner Elinor and fitness entrepreneur Born Barikor set themselves the near impossible task of creating Britain's first hypoallergenic house. 3/6

Renowned chef Rick Stein searches for the source of the Chinese dishes known around the world.

Nadiya creates dishes ideal for family get-togethers, learns how to perfect her BBQ technique with BBQ-King James, and meets Paul Ainsworth, Michelin Star Chef. 2/8

Gregg and Chris are in Scotland with a young family relying on takeaways and wasting food. Dad Ajaz wants spicy dishes whereas mum Aliyah prefers milder flavours, but can we get them eating more veg, enjoying the same food and saving money? 4/6

The bikers cross the state of Arizona in search of the Wild West. They are invited to a traditional Navajo barbecue where a sheep is butchered, grilled and eaten alongside some traditional fry bread. 5/6

Gordon cooks up Merguez and Fontina stuffed croissants and a spicy Mexican soup whilst daughter Megan helps cook a divine spiced banana tart tatin. 4/20

Nadiya creates dishes ideal for family get-togethers, learns how to perfect her BBQ technique with BBQ-King James, and meets Paul Ainsworth, Michelin Star Chef. 2/8

Renowned chef Rick Stein searches for the source of the Chinese dishes known around the world.

Gregg and Chris are in Scotland with a young family relying on takeaways and wasting food. Dad Ajaz wants spicy dishes whereas mum Aliyah prefers milder flavours, but can we get them eating more veg, enjoying the same food and saving money? 4/6

The Teletubbies bottom bounce on The Tubby Bouncy before wiggling their bottoms to a special bottom bump song. 101/30

Up in the music boat, Small Clanger and Major Clanger spot something glowing in one of the craters on their planet. They land to take a closer look, and find a big bowl of glow honey. 44/52

Flynn The Fire Engine is able to run on the roads again, but he is nervous because his wheels wobble. 1/20

Gran Gran busts a groove when she teaches JoJo the moves to a traditional Saint Lucian dance. JoJo finds that learning a dance can take time, before realising she can put her own twist on it. 11/43

Dee encourages a friend to say 'shoes' and we go on a whirlwind word adventure! Dee see lots of different types of shoes - flashy shoes, dashy shoes, shiny shoes and even flying shoes! 16/20

Pup is at the beach and Kit is in the snow. Can you see who has the melting ice cream and who has the frozen lolly? Kit and Pup are also helping a little investigator discover which food will melt and which will stay the same. 23/52

Duggee shows the squirrels how to enjoy things at a slower pace, but things change when they bump into Tortoise who needs to get to the hospital as his wife is having babies! 25/52

Happy discovers his wobbly tooth has come out, but he's lost it! The squirrels start to look for it but they can't find it anywhere. It's time to think carefully and remember. 24/52

Duggee and the squirrels help to put on an amateur dramatic show, but no-one can agree on whether it should be all-singing, all-dancing extravaganza or a serious drama. 23/52

Xuli dives into action when Glitch's pirate game puts Lars in danger. Yo-ho Go Jetters go! 40/50

A trip to see fireflies becomes a rescue when Xuli and Glitch get stuck in a swamp. 39/50

Dog and Pug meet a pirate captain on a desert island who is hunting the Snark. Our friends realise that they should protect the Snark and develop a game of hide and seek. 1/52

Pug makes a kite but he doesn't know how to fly it. He and Dog go to China, they meet two squabbling Pandas looking for bamboo shoots. Pug and his kite get blown up into the air and he lands in a bamboo forest. 52/52

Andy arrives 30 million years ago in Mongolia, where he meets the paraceratherium; a giant mammal five times the size of a rhinoceros. 6/25

Gem and her teams of Swashbucklers try to win her jewels back from pirates Cook, Line and Sinker. 19/26

Ferne visits Chloe and Ella and their pony Twiggy, who is about to give birth to a foal. Rory heads off to a zoo and meets their vet who is checking on a very large lizard. 8/25

There has been a power cut, but luckily Duggee has torches for everybody and the squirrels use them to make shadows. 22/52

Duggee is cleaning his biscuit tin collection, and the squirrels are inspired to make their own collections and then display their precious things in the clubhouse. 21/52

The squirrels are all hyped up with bundles of energy. Things are starting to get a bit frantic, and Duggee needs to calm them all down. Fortunately, he has his Yoga Badge. 20/52

There's a storm brewing after Glitch's fake weather report puts the cadets in danger. 38/50

Xuli and Foz help NASA after a close encounter with a UFO makes them lose the Mars Rover. 37/50

Flynn starts to put out fires that don't actually exist. 20/20

A trip to the art gallery unexpectedly helps Duck with the hunt for his lost toy Rhino. 36/40

When Sarah forgets her sandwich, her rumbling tummy inadvertently starts a conversation with a Frog. 35/40

It's spring! But the sheep can't take off their hot winter jumpers. 16/52

Lola and Lotta are practising their song for the school concert, but when Lola gets a fit of the hiccups she worries they'll never go away. 10/26

Gwen Tony and Bob encounter a Dinopaw called Dot who loves playing 'let's pretend'. 36/26

The Dinopaws are playing at being the moon and the sea when they disturb Baby Sitter Dino 35/26

Dee encourages a friend to say 'egg' and we go on a whirlwind word adventure! We see lots of eggs - a dippy egg, a fried egg, a gold egg and Dee and a friend even dress up as eggs. 15/20

Kit and Pup are at the beach. Can you see if the beach is hot or cold? Kit and Pup are also helping a little investigator sort clothes for hot and cold weather. 22/52

Duggee has a package that needs delivering right at the other end of the river. It looks like the squirrels are going to have a day out on the boat! Good job Duggee has his River badge! 19/52

The squirrels make new friends, play games and have a picnic at a Jamboree. They meet another group of young animals with their very own version of Duggee but everything they do is different. 18/52

Duggee and the squirrels are going camping, so they build a tent. Then the squirrels hear a scary noise outside the tent. What can it be? All sorts of things are imagined. DUGGEE!! 17/52

It's a rainy day and the team are stuck inside, so Foz reads them his favourite book: Around the World in 80 Days by Jules Verne. The Go Jetters are soon imagining they are characters from the story. 36/50

Kyan has to use some smooth talking to save the tourists and protect Blarney Castle. 35/50

When Larry gets the hiccups, the strange noises he makes causes havoc in the Gorge. Will he have to move away forever? 3/25