Series 9

The Atomic Blade

What makes things sharp?

• 23 mins

Series 9

The Cosmic Egg

How do we measure the age of the universe?

• 30 mins

Series 10

The Fifth Dimension

Is there a fifth dimension? Hannah and Adam visit CERN to find out.

• 27 mins

Series 10

The Human Instrument

Why do our voices change as we get older?

• 27 mins

Series 10

The Déjà Vu

Why do we get déjà vu?

• 25 mins

Series 10

The Lucky Number

How do I win the lottery?

• 25 mins

Series 10

The Dawn Chorus

Why do birds sing? And why are some songs so complex?

• 27 mins

Series 11

The Alien Enterprise Part 1

How do we look for alien life, and what are we expecting to find?

• 25 mins

Series 11

The Alien Enterprise Part 2

Are intelligent aliens out there?

• 24 mins

Series 11

The Running Joke

How fast can a human run?

• 38 mins

Series 11

The Random Request

Is anything really random?

• 26 mins

Series 11

A World of Pain

Why do we all have different pain thresholds?

• 33 mins

Series 12

The Viking Code

How do ancestry DNA tests work?

• 26 mins

Series 12

The Stressful Scone

Why do we have regional accents?

• 33 mins

Series 12

Two Infinities and Beyond - part 1

Does infinity exist? And why are some infinities bigger than others?

• 32 mins

Series 12

Two Infinities and Beyond - part 2

Is anything in the Universe infinite? Science sleuths Drs Rutherford and Fry investigate.

• 31 mins

Series 12

The Good Bad Food

Why does bad food taste so good? Science sleuths Drs Rutherford and Fry investigate.

• 26 mins

Series 12

The Horrible Hangover

Why do we get hangovers and are some drinks worse than others?

• 31 mins

Series 13

The Mesmerist

Is hypnotism real? Drs Rutherford and Fry find out by visiting a hypnotist

• 35 mins

Series 13

The Periodic Problem

How do you discover a new chemical element?

• 28 mins

Series 13

An Instrumental Case

Why do instruments sound different?

• 39 mins

Series 13

The Lunar Land Pt 1

Where did the Moon come from?

• 30 mins

Series 13

The Lunar Land Pt2

What would life be like if we had two moons?

• 29 mins

Series 13

Jurassic Squawk

What sound did dinosaurs make?

• 37 mins

Series 14

A Frytful Scare Part 1

Why do we enjoy horror? Rutherford and Fry explore the thrill of fear

• 31 mins

Series 14

A Frytful Scare Part 2

Rutherford and Fry board a rollercoaster to investigate why we enjoy being scared

• 32 mins

Series 14

Stephen Fry's Identity Crisis

Stephen Fry asks the duo to investigate why he struggles to remember faces.

• 36 mins

Series 14

The Heart of the Antimatter

How do you make antimatter? Science sleuths Drs Rutherford and Fry investigate.

• 31 mins

Series 14

The Trouble Sum Weather

Why is it so difficult to predict the weather?

• 35 mins

Series 14

The End of the World

What would become the dominant species if, or when, humans go extinct?

• 42 mins