On 13 July 1985, Vice President George H. W. Bush became Acting President of the United States for approximately eight hours whilst Ronald Reagan underwent surgery under general anaesthetic. It was the first time the Twenty-Fifth Amendment’s provisions for voluntary transfer of power had been used in practice, if not technically invoked. Bush spent his brief tenure playing golf in Maine, a masterclass in constitutional restraint. The episode also explores a failed 2003 French intelligence operation to rescue hostage Íngrid Betancourt from FARC guerrillas, the 645 CE Isshi Incident that reshaped Japanese imperial politics through assassination and reform, and the 1925 discovery of the Venus of Dolní Věstonice, one of the oldest known ceramic objects in the world, dating back some 26,000 to 31,000 years. From presidential procedures to ice age artistry, the thirteenth of July offers a cross-section of human decision-making at its most careful, most violent, and most enduring.