Caesar's objection to the treaty over Pompey's refusal to meet Caesar has merit. Under Ancient Roman law, no treaty between two warring parties was legal unless the leaders met face-to-face.
Mark Anthony's statement (and episode title) "the ram has touched the wall" is mentioned in Julius Caesar's memoirs, and is a metaphor for 'no mercy'. Romans had the policy of offering favorable terms of surrender to their opponents before a fight. However, if the opponent refused such terms and chose to fortify his positions, the Romans would attack until each and every enemy was dead. So, if the 'ram' had touched the wall, and thus battering rams became necessary, it meant the enemy had declined the peace offer, and therefore waived any chance of a merciful treatment.
Evocati is a Latin word for a Roman soldier that finished his time of service and enlists once again (of their own accord) at the request or invitation of a commander.
Broadcast after the death of John Bennett who acted in this.