This episode came out of the question, 'What do we do now that we think will become unacceptable in the future?'

Things have changed a lot in the last couple of hundred years, and not just technologically; human values have also changed. Attitudes that were commonplace just a few generations ago now seem prehistoric. So do we have to forgive the people of the past because 'it was a different time', or are they all just as guilty as if they were born now? And how long will we keep the values we have now? Will they seem outdated and ludicrous to future generations?

These are all interesting questions that could do with some expert analysis, but unfortunately you've got Nick and Carey rambling as usual.`