Catch up TV

CBeebiesDo You Know?

Series in which Maddie Moate discovers how things work.

Do You Know? Episodes

Series 1: 22. Escalator And Wheelbarrow

Do You Know? - Series 1: 22. Escalator And Wheelbarrow

Maddie is at a shopping centre. She uses special cameras to find out how an escalator works to move people from one floor to another. An animation shows the hidden cogs and chai ...

20-11-2018

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Series 1: 21. Magnets And Teddy Bears

Do You Know? - Series 1: 21. Magnets And Teddy Bears

Maddie is looking at toys. She uses a special slow-motion camera to find out how the magnets on a train set work. An animation shows how the north and south poles on magnets wor ...

19-11-2018

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Series 1: 20. Eggs And Bread

Do You Know? - Series 1: 20. Eggs And Bread

Maddie is making breakfast in the kitchen. She visits a farm to see where eggs come from and uses a special thermal imaging camera to show why eggs change colour when they' ...

16-11-2018

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Series 1: 19. Dishwasher And Table

Do You Know? - Series 1: 19. Dishwasher And Table

Maddie is in the kitchen. She uses a special waterproof camera to see how the dishwasher works to clean dirty dishes. An animation shows what happens inside once the door is clo ...

15-11-2018

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Series 1: 18. Bus Ramp And Roads

Do You Know? - Series 1: 18. Bus Ramp And Roads

Maddie is out and about exploring different ways to travel. She uses a special camera to find out how a bus ramp works to help people get on and off the bus. An animation shows ...

14-11-2018

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Series 1: 17. Piano And Drums

Do You Know? - Series 1: 17. Piano And Drums

Maddie looks at musical instruments. She uses a special slow-motion camera to find out how a piano works and how the keys on the piano are attached to levers and hammers. She sh ...

13-11-2018

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Series 1: 16. Lock & Key And Glass

Do You Know? - Series 1: 16. Lock & Key And Glass

Maddie explores the house. She uses a special camera and animation to see how a key works inside a lock and shows how the hidden barrel and pins inside the lock work, to allow t ...

12-11-2018

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Series 1: 15. Crane And Bricks

Do You Know? - Series 1: 15. Crane And Bricks

Maddie visits a building site. She uses a special camera to see how a big crane works to move heavy objects from one place to another. An animation shows how the hydraulic mecha ...

09-11-2018

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Series 1: 14. Carousel And Wax Crayons

Do You Know? - Series 1: 14. Carousel And Wax Crayons

Maddie goes for a fun day out. She visits a fairground and goes for a ride on a carousel, using a special camera to find out how it works. An animation shows how the carousel go ...

08-11-2018

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Series 1: 13. Toilet Flush And Toilet

Do You Know? - Series 1: 13. Toilet Flush And Toilet

Maddie is in the bathroom. She uses a special underwater camera to find out how a toilet flush works and why it makes a gurgling sound. An animation shows how the float ball and ...

07-11-2018

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Series 1: 12. Helicopter Rotor And Tricycle

Do You Know? - Series 1: 12. Helicopter Rotor And Tricycle

Maddie is out and about exploring different ways to travel. She visits an airfield and uses a special camera to find out how the rotor works to help make a helicopter fly. An an ...

06-11-2018

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Series 1: 11. Popcorn And Pasta

Do You Know? - Series 1: 11. Popcorn And Pasta

Maddie explores some favourite foods. She uses a special slow-motion camera to find out why popcorn pops. An animation shows what popcorn is made of and how a water droplet hidd ...

05-11-2018

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Series 1: 10. Water Park And Ice Cream

Do You Know? - Series 1: 10. Water Park And Ice Cream

Maddie goes for a fun day out. She visits an indoor water park and uses a special waterproof camera and animation to show how a water slide works. She then goes underneath the s ...

02-11-2018

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Series 1: 9. Hot Water And Toothpaste

Do You Know? - Series 1: 9. Hot Water And Toothpaste

Maddie is preparing for bath time. She uses a special thermal-imaging camera to find out how the hot water system in a house works and then visits a reservoir to see where the w ...

01-11-2018

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Series 1: 8. Blood Pressure Monitor And Cast

Do You Know? - Series 1: 8. Blood Pressure Monitor And Cast

Maddie visits a hospital. She uses a special light to see the blood vessels under her skin and finds out how a blood pressure monitor works to check that blood is flowing freely ...

31-10-2018

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Series 1: 7. Boat Propeller And Hot-air Balloon

Do You Know? - Series 1: 7. Boat Propeller And Hot-air Balloon

Maddie is out and about exploring different ways to travel. She uses a special underwater camera to see a boat propeller in action and an animation reveals how the propeller pus ...

30-10-2018

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Series 1: 6. Cat Flap And Woolly Hat

Do You Know? - Series 1: 6. Cat Flap And Woolly Hat

Maddie meets some furry friends. She uses special cameras to find out how a digital cat flap works and how a tiny microchip unlocks the cat flap so the cats can go in and out of ...

29-10-2018

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Series 1: 5. Bike Chain And Tennis Ball

Do You Know? - Series 1: 5. Bike Chain And Tennis Ball

Maddie is outside being active. She uses a special camera to find out how the chain on a bicycle works to turn the wheels and how the front wheel and handlebars are used to stee ...

26-10-2018

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Series 1: 4. Bin Lorry And Newspaper

Do You Know? - Series 1: 4. Bin Lorry And Newspaper

Maddie does the recycling. She uses a special camera to find out how a bin lorry works to lift a bin and tip the rubbish into the hopper. An animation reveals how a moving wall ...

25-10-2018

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Series 1: 3. Fizzy Water And Yoghurt

Do You Know? - Series 1: 3. Fizzy Water And Yoghurt

Maddie looks at food and drink. She uses a special slow-motion camera to find out how bubbles get inside a bottle of fizzy water. Animation shows how gas is used to create the b ...

24-10-2018

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Series 1: 3. Fizzy Water And Yoghurt

Do You Know? - Series 1: 3. Fizzy Water And Yoghurt

Maddie looks at food and drink. She uses a special slow-motion camera to find out how bubbles get inside a bottle of fizzy water. Animation shows how gas is used to create the b ...

24-10-2018

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Series 1: 3. Fizzy Water And Yoghurt

Do You Know? - Series 1: 3. Fizzy Water And Yoghurt

Maddie looks at food and drink. She uses a special slow-motion camera to find out how bubbles get inside a bottle of fizzy water. Animation shows how gas is used to create the b ...

24-10-2018

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Series 1: 2. Fire Engine Hose And Reflective Strips

Do You Know? - Series 1: 2. Fire Engine Hose And Reflective Strips

Maddie looks at the emergency services. She uses a special camera to find out how the hose on a fire engine works and how the pump inside the fire engine creates pressure and se ...

23-10-2018

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Series 1: 1. Hamster Wheel And Insect Hotel

Do You Know? - Series 1: 1. Hamster Wheel And Insect Hotel

Maddie meets some furry friends and creepy crawlies. She visits a pet shop and uses a special night-vision camera to find out how a hamster wheel works and how far a hamster can ...

22-10-2018

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Series 1: 24. Zips And Screen Printing

Do You Know? - Series 1: 24. Zips And Screen Printing

Maddie looks at clothes. She uses a special microscope camera to look at the zip on her hoodie. An animation shows how the slider works to pull the two rows of teeth together to ...

20-10-2018

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Series 2: 5. Opticians And Glasses

Do You Know? - Series 2: 5. Opticians And Glasses

Today, Maddie is finding out how wearing glasses helps us to see more clearly. She visits an optician to see how an eye test works by having one herself. She reads the charts an ...

12-10-2018

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Series 2: 4. Clock And Cutlery

Do You Know? - Series 2: 4. Clock And Cutlery

Today, Maddie is finding out how clocks tell the time. She heads to a clock factory and uses a special time-lapse camera to show how the hands on the clock move around. Maddie a ...

11-10-2018

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Series 2: 3. Ice Rink And Bouncy Castle

Do You Know? - Series 2: 3. Ice Rink And Bouncy Castle

Today, Maddie is having a fun day out. She uses a special thermal camera at an ice rink to find out how runny water freezes to make solid ice we can skate on. Next, Maddie heads ...

10-10-2018

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Series 2: 2. Umbrella And Carwash

Do You Know? - Series 2: 2. Umbrella And Carwash

Today, Maddie is having fun with water. She takes a car through an automatic car wash to find out how the computer uses sensors to tell the robotic car wash how to wash the car, ...

09-10-2018

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Series 2: 1. Shipping Container And Bubble Packaging

Do You Know? - Series 2: 1. Shipping Container And Bubble Packaging

In today's episode Maddie is on the move. She finds out how things that we use every day are brought to us on big ships and moved around the country in shipping containers ...

08-10-2018

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Series 2: 25. Refrigerator And Mushrooms

Do You Know? - Series 2: 25. Refrigerator And Mushrooms

In today's episode, Maddie is at home to show us how a refrigerator works. She explains how the pump and the long pipes inside a fridge change a cooling liquid into a gas t ...

05-10-2018

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Series 2: 24. Barcode And Fish Cake

Do You Know? - Series 2: 24. Barcode And Fish Cake

In today's episode, Maddie is visiting a supermarket, where she finds out what barcodes are and how they work. At the checkout, we learn how an infrared scanner reads barco ...

04-10-2018

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Series 2: 23. Prosthetic Limb And Detection Dog

Do You Know? - Series 2: 23. Prosthetic Limb And Detection Dog

In today's episode, Maddie is looking at the way things are made or trained to help us. First, she meets seven-year-old Anu, who uses a prosthetic leg. Maddie visits a work ...

03-10-2018

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Series 2: 22. Hand Dryer And Toilet Roll

Do You Know? - Series 2: 22. Hand Dryer And Toilet Roll

In today's episode, Maddie is looking at things we use when we go to the toilet. She visits a factory to see how hand dryers work. She shows us how infrared light is used t ...

02-10-2018

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Series 2: 21. Fish Tank And Bath

Do You Know? - Series 2: 21. Fish Tank And Bath

In today's episode, Maddie finds out about things that use water. She visits an aquatic centre to show us how a fish tank works, using a special underwater camera to explai ...

01-10-2018

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Series 2: 20. Kite And Wind Turbine

Do You Know? - Series 2: 20. Kite And Wind Turbine

In today's episode, Maddie is outdoors finding out about things that use the wind. She finds out how a kite works when it flies high in the sky, shows us how to measure the ...

28-09-2018

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Series 2: 19. Television And Carpet

Do You Know? - Series 2: 19. Television And Carpet

In today's episode, Maddie is relaxing at home, playing games and watching television. She shows us how a television screen works using millions of tiny squares called pixe ...

27-09-2018

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Series 2: 18. Lift And Spacesuit

Do You Know? - Series 2: 18. Lift And Spacesuit

In today's episode, Maddie is finding out about things that go up and down. She shows us how a lift works, when it carries people up and down between floors of a building. ...

26-09-2018

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Series 2: 17. Bubbles And Chocolate

Do You Know? - Series 2: 17. Bubbles And Chocolate

In today's episode, Maddie is having a party! She finds out how bubbles work when we blow into bubble mixture. She shows us how the surface tension of water changes when we ...

25-09-2018

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Series 2: 16. Posting A Letter And Colouring Pencils

Do You Know? - Series 2: 16. Posting A Letter And Colouring Pencils

In today's episode, Maddie is sending a letter in the post to the CBeebies house. She finds out how posting a letter works as she follows the letter's journey from the ...

24-09-2018

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Series 2: 15. Disco Ball And Jigsaw Puzzle

Do You Know? - Series 2: 15. Disco Ball And Jigsaw Puzzle

In today's episode, Maddie is having fun. She takes to the dance floor to show us how a disco ball works. We learn how light is reflected in lots of different ways, and a s ...

26-05-2018

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Series 2: 14. Playground And Plant Pot

Do You Know? - Series 2: 14. Playground And Plant Pot

In today's episode, Maddie is having fun outdoors. First, she's in a playground learning how we keep swinging on a swing and how gravity helps us slide down a slide. S ...

20-05-2018

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Series 2: 13. Hairclippers And Ballet Shoes

Do You Know? - Series 2: 13. Hairclippers And Ballet Shoes

Today, Maddie is dressing up. She visits a barber to find out how clippers work to cut hair. Using a special microscope camera, Maddie shows us how the blades work, and a slow-m ...

19-05-2018

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Series 2: 12. Traffic Lights And Emergency Lights

Do You Know? - Series 2: 12. Traffic Lights And Emergency Lights

In today's episode, Maddie is looking at useful lights. She shows us how traffic lights work so that vehicles can travel safely through a road junction. She visits a traffi ...

13-05-2018

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Series 2: 11. Aeroplane And Trainers

Do You Know? - Series 2: 11. Aeroplane And Trainers

Today, Maddie is on the move. She gets on board an aeroplane and shows us all the buttons inside the cockpit and how they work. Then she sits alongside Bridget, a pilot, in a fl ...

12-05-2018

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Series 2: 10. Lifeboat And Concrete

Do You Know? - Series 2: 10. Lifeboat And Concrete

She goes on a training rescue mission with a lifeboat team to find out how the equipment on a lifeboat works. She shows us how the special thermal-imaging cameras are used to fi ...

06-05-2018

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Series 2: 9. Handwash And Vacuum

Do You Know? - Series 2: 9. Handwash And Vacuum

In today's episode, Maddie is cleaning up. She visits a factory where hand wash is made and uses her special camera to see inside a big vat to see the colour being mixed. N ...

05-05-2018

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Series 2: 8. Train Tracks And Paint

Do You Know? - Series 2: 8. Train Tracks And Paint

In today's episode, Maddie is at a train museum finding out how signal boxes work and how trains are moved from one track to another to get to the right place. Maddie puts ...

03-05-2018

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Series 2: 7. Canal Lock And Gate

Do You Know? - Series 2: 7. Canal Lock And Gate

In today's episode Maddie is finding out about different gates that open and close. She visits a canal lock to find out how canal boats travel up and down hill. Maddie jump ...

02-05-2018

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Series 2: 6. Sleeping Bag And Mattress

Do You Know? - Series 2: 6. Sleeping Bag And Mattress

It's bedtime and Maddie is finding out about different things we sleep on and in! At a campsite she uses a special thermal camera to show how the layers in a sleeping bag w ...

01-05-2018

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