Throughout the year, I've been stockpiling your requests for etymologies, and for the last episode of 2015, here are some answers! Ever wondered about the correct plural of 'octopus', who was the original nemesis, or whether 'picnic' is racist?

There's also a sprinkling of anecdotes there wasn't room for in the show earlier this year. Prepare for Klingon, acid trips, Cliff Richard, and Michael Palin's cock.