In the season finale, Spartacus enlists the help of an accomplice in order to get his revenge.

Numerius is honored with an exhibition match for his birthday celebration at the ludus. Ilithyia gives Numerius a surprising gift, but asks for something in return.

Lucretia and Batiatus await the arrival of Glaber with the intentions to receive his patronage, while Spartacus focuses his attention on his plan for revenge.

Batiatus is presented with a gladiatorial opportunity of a lifetime. Spartacus and Crixus must overcome their mutual hostility to fight as a team against a legendary and unbeaten opponent.

Spartacus and his outnumbered rebels make one last attempt to win freedom in an epic final battle against the Romans.

Batiatus breaks the news that Spartacus is to service the richest woman in Rome.

When a shortage in supplies has the rebellion about to fail, Spartacus tries his best to give his men hope.

Spartacus hovers on the brink. Meanwhile, Batiatus plots revenge against his enemies

Lies, distrust and duplicity plague the house of Batiatus and impact the hopes of both Barca and Spartacus, who have benefited from good fortune and envision a future away from the grounds. Barca expects to buy his and his male lover's way out, while Spartacus anticipates his promised reunion with his enslaved wife, part of his reward for a monumental victory in the arena. But just in case things go wrong, Spartacus dreams and schemes an escape plan.

Crassus learns that a fellow prominent Roman is attempting to steal the glory of defeating Spartacus. Spartacus aims to secure a bargaining chip he can use against the Romans.

Having performed shamefully in the arena against Crixus, Spartacus is forced to fight in the Pits. Batiatus, determined to profit from Spartacus, may be at risk if his debts aren't repaid.

Batiatus purchases a fresh batch of slaves during an auction to be trained as gladiators and ponders the idea of selling Crixus.

Overcome by the pressure of Batiatus's control, Spartacus must make a choice: leave his past behind and assume the mantle of a champion gladiator, or die.

In an ironic twist of fate, a gladiator from the house of Batiatus will stand in the way of Spartacus trying to free Crixus from Roman captivity. Ilithyia's scheming puts her marriage to Glaber at risk.

Though Spartacus proved himself during training and now wears the attire of a gladiator, his coarse attitude and relentless quest to see his wife isolates him from his fellow gladiators and Doctore.

Spartacus has to once again use his leadership skills to convince his band of rebels to unite against the Roman assault. Lucretia struggles to get rid of those men standing in the way of her fate.

Enslaved in gladiatorial school, the newly christened Spartacus must try to suppress his desire for vengeance when his new master promises to reunite him with his wife.

Spartacus puts a plan in motion to weaken Crassus's forces and gain the upper hand. Betrayal threatens to foil the plan.

Spartacus and his group of rebels attempt to free those who became slaves by falling in foreign wars while Lucretia manages to recruit one of her husband's former gladiators.

The Romans, in an effort to protect their homeland, seek the help of Thracian warrior Spartacus and his team of fighters. After a violent incident, Spartacus must enter the gladiator ring to face his punishment from the Romans.

Spartacus and his rebels train hard to keep their new sanctuary safe while Glaber's forces are made stronger with the enlistment of some new deadly recruits. Lucretia and Ilithyia become close again.

While Spartacus finds an opportunity to get revenge, Glaber is surrounded by intrigue.

Spartacus continues to build a formidable army and outwit Romes best commanders. The powers of the Empire are forced to turn to wealthy, ambitious Marcus Crassus to aid the campaign.

As Crassus leads an onslaught against the rebel-occupied city, Gannicus finds himself trapped behind enemy lines. Tiberius is tasked by Crassus to hold a celebration in honor of a man he despises.

Their forces trapped on an impassable, snowbound ridge, Spartacus and Crixus clash over the method of escape. Crassus discovers it increasingly difficult to control the actions of those closest to him.