The story of the Roman slave Spartacus: the indomitable fighter who decided to rebel against his destiny as a slave is at the center of this episode of "Ulisse: il piacere della scoperta". Alberto Angela recounts the rise of this warrior from Thrace who, endowed with immense physical strength and enlisted as a gladiator, organized a revolt against Rome destined to remain, due to his greatness and violence, in history. From the amphitheater of Santa Maria Capua Vetere, in the province of Caserta, a stadium capable of accommodating 40 thousand people, we delve into the history of the Roman arenas, places of tragedy and pain but which for centuries served as the backdrop to the most loved and appreciated shows of the whole Mediterranean: the gladiatorial games.