The Why Factor Episodes Available now
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- Available now (35)
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![](https://ichef.bbci.co.uk/images/ic/320x180/p059b5sz.jpg)
Polygamy—Series 4
Why do some people practice polygamy?
![](https://ichef.bbci.co.uk/images/ic/320x180/p059b5x8.jpg)
Goths—Series 4
Why would anyone be a goth? What is the appeal of this dark and spooky subculture?
![](https://ichef.bbci.co.uk/images/ic/320x180/p059b5sm.jpg)
Hypochondria—Series 4
Why do people suffer from hypochondria, and why do they attract so little sympathy?
![](https://ichef.bbci.co.uk/images/ic/320x180/p0309qmk.jpg)
The Circus—Series 3
10/10 Why does the circus endure? Mike Williams explores its lasting appeal.
![](https://ichef.bbci.co.uk/images/ic/320x180/p0309qmk.jpg)
Addiction—Series 3
9/10 Why do some people suffer addiction?
![](https://ichef.bbci.co.uk/images/ic/320x180/p0309qmk.jpg)
Magicians—Series 3
8/10 Why do some people become magicians?
![](https://ichef.bbci.co.uk/images/ic/320x180/p0g06gkt.jpg)
Conspiracy Theories—Series 3
7/10 Why do people believe in conspiracy theories? Mike Williams investigates.
![](https://ichef.bbci.co.uk/images/ic/320x180/p0309qmk.jpg)
Time Perception—Series 3
6/10 Why do some weeks just fly by but sometimes minutes can seem like hours?
![](https://ichef.bbci.co.uk/images/ic/320x180/p0309qmk.jpg)
Cycling—Series 3
5/10 Mike Williams asks why so many people have become obsessed with two-wheel travel.
![](https://ichef.bbci.co.uk/images/ic/320x180/p0309qmk.jpg)
Drawing—Series 3
4/10 Why do so many people love drawing? And what do those drawings reveal?