Cicero's protégé, Marcus Brutus (Cam Clarke). At the camp, Claudia tells Agrippa she and Sextus are not brother and sister; he rescued her as a child after her brother was killed by a Roman soldier. Meanwhile, Sextus is visited by Iris (Heather Halley) and Charmian (Jennifer Hale), who come with "a direct order from our mistress." They want Sextus to assassinate someone, in return for their mistress aiding his plans. Sextus agrees. In Rome, Octavianus finds Cicero stabbed in his office. The dying Cicero tells him a group of conspirators are responsible for Caesar's assassination, and Vipsanius is innocent. Marcus is a member of the group, but the actual murderer is "another Brutus." Meanwhile, Agrippa makes it to the finals of the tournament in the Colosseum. Octavianus heads to meet Marcus, where he finds multiple senators murdered, and a distraught Marcus, who says the other Brutus is killing off the members of the conspiracy. However, he refuses to reveal his identity. At the camp, Claudia tells Agrippa Sextus is really the son of Pompeius, who was killed in battle by Caesar. She explains he plans to assassinate Octavianus (Caesar's only surviving blood relative) in order to gain support for his conquest of Rome. Meanwhile, Octavianus finds a note in Caesar's handwriting speculating as to the worthiness of possible successors, and learns that Antonius was not his chosen heir. At the camp, Sextus abruptly disappears along with a number of gladiators, and Claudia learns he is working for Iris and Charmian. In Rome, Sextus confronts Octavianus, and is about to kill him when Claudia intervenes. Octavianus flees, and witnesses Decius stabbing Marcus. A dying Marcus tells Octavianus that Decius is the "other Brutus." Maecenas then has Octavianus arrested. In the final of the tournament, Agrippa faces Decius, whom he defeats and is about to kill him when Maecenas arrives in the arena, announcing the return of Caesar. He explains the man killed was a decoy employed because Caesar knew about the conspiracy, announcing the murder was carried out by Decius, not Vipsanius. Caesar arrives and addresses Antonius, telling him he did not chose him as his heir. Iris and Charmian revealed Caesar's true choice to Antonius, who masterminded the conspiracy. A shocked Antonius admits his guilt, at which point Maecenas reveals Caesar really is dead, and the man pretending to be him is his true chosen heir - Octavianus. A furious