4. Decimation

As punishment for the unauthorized attack which resulted in the pointless deaths of many Roman soldiers, Crassus orders his son and the soldiers who participated in the attack to take place in decimation, where 10 Roman soldiers will be randomly picked from the 10 legions and executed for cowardice as a consequence of the failed attack. It ultimately leads to Tiberius being forced to participate in the execution of his best friend Sabinus. Although Sinuessa's food supplies are running out and Cilican pirate captain Heracleo can't promise enough (except wine) even at premium prices, Spartacus orders that new slaves be admitted, after screening for undercover Romans, a group of which fails to force the gate.

Julius Caesar manages to pose as a escaped shepherd slave and wins the confidence of dishonest schemer Nemetes. As a result, Caesar discovers and fuels dissension in Spartacus's camp, yet causes only the slaughter of most Romans and doubt in Crixus's mind as to whether Spartacus should still be obeyed. After Spartacus saves Laeta from being killed, Crixus tells Naevia that they must form their own path in their rebellion.