Once again Greg and Jem return for another discussion about history, and it is Jem's turn to pick the topic, and so Greg is left in utter confusion as he finds out that everything he thought he knew about the end of the Roman Empire is entirely wrong, and Jem sets to work trying to prove it.

Greg is on safer ground once they get to 'What If' however when he tackles the question of what would have happened if Julius Caesar had died earlier. Showing his usual skill at taking the topic where you never thought it would go, Greg proves he had forgotten to eat before the podcast once again throughout his answer!