This week we examine eggs, meet the first flying pig, and hear two Sandi Toksvigs.
That is because one of the guests tonight is impressionist Jan Ravens who can impersonate Sandi. Joining them are Bill Bailey and artist Grayson Perry as they and Alan Davies answer questions on how you can get an egg into a bottle without breaking it, the thing that makes the FBI go OMG, and what the secret behind virgin boy eggs is.
For those that like audience participation, you may want to tune up on your theme tunes for Wild West films and TV shows.
QI is on BBC Two at 22.00.