Sandi Toksvig and Alan Davies may be feeling oojah-cum-spliff with this odd collection of interesting questions.
Joining them are Liza Tarbuck, Romesh Ranganathan and Matt Lucas as they face other oddities. These include finding out which animal beginning with “O” is the most rescued by fire fighters, what was the exact train the Murder on the Orient Express took place, and what a sperm stomach is used for.
There is also the return of an old question with a slightly new twist: how many Moons did the Earth have?
QI is on BBC Two at 22.00.