QI - What would Jack Bauer sound like in London?

The panel discuss what Jack Bauer might sound like if he had to deal with London roadworks.

QI - The Leidenfrost Effect

Stephen shows how beads of water react to specially shaped hot metal.

QI - Bill Bailey turns the camera off

Stephen Fry insists Bill Bailey clap twice to turn the cameras back on.

QI - Pouring a liquid uphill

Stephen pours polyethylene oxide uphill under ultraviolet light.

QI - How hard is it to be a nude model?

Is it hard to be a nude model? The Register of Artists' Models has some rules and tips to avoid cramp.

View this clip on the BBC website

QI - Trevor Noah's click-singing

Trevor Noah talks about Zulus and demonstrates his click-singing.