You'd think it'd be Mars... but Mercury is the closest planet to Earth. Sometimes. QI explains.
The panel learn about what happens to the poo on Mount Everest.
Alan Carr is pleased to be on television with another Alan.
The rivalry continues!
Alan Davies is annoyed he has to record an episode of QI when his football team Arsenal are playing. In this video we see him checking the scores during the breaks in recordings.
To welcome our guests making their debut in Series Q, we've provided them all with a welcome fact!