At the end of the series: He survives, barely escaping a fight against Spartacus himself. His army defeats the rebels. However, Pompey steals credit for the victory.
History says that Marcus Crassus was given the province of Syria to Govern. But due to his need to compete against Pompey Magnus and Julius Caesar in terms of military victories, Crassus decided to invade Parthia. The King of Armenia even offered Crassus assistance of 40,000 troops if he but invaded through Armenia. Crassus refused and decided to take a more direct approach by crossing the Euphrates. Crassus' troops were nearly massacred by the Parthians due to their fighting technique, which the Romans were not trained to defend against.
Subsequently Crassus' men, being near mutiny, demanded he parley with the Parthians, who had offered to meet with him. Crassus, despondent at the death of his son Publius in the battle, finally agreed to meet the Parthian general; however, when Crassus mounted a horse to ride to the Parthian camp for a peace negotiation, his junior officer Octavius suspected a Parthian trap and grabbed Crassus' horse by the bridle, instigating a sudden fight with the Parthians that left the Roman party dead, including Crassus. A story later emerged that, after Crassus' death, the Parthians poured molten gold into his mouth as a symbol of his thirst for wealth. Or, according to a popular but historically unreliable account that it was by this means that he was put to death.