as agrippa fights his way through the tournament, octavianus begins to follow 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.