In this episode, Cameron & Hallam revisit a stage in their life they really don't miss...Looking back at how they revised for their biggest exams, and the difference they experienced between GCSE, then A-Levels and finally University exams. They share some tips that helped them get through, especially during the Christmas period, when most people want to do nothing but eat, drink and be merry. Mixing revision into that, certainly leaves "merry" lagging behind. They then decide to test themselves, to see how much revision has helped them over the years, testing their knowledge with some GCSE Chemistry and A-Level Chemistry questions taken from past papers of the last couple of years.