Kevin McKidd Lucius Vorenus Actor Ray Stevenson Titus Pullo Actor Polly Walker Atia of the Juli Actor James Purefoy Mark Antony Actor Tobias Menzies Marcus Junius Brutus Actor Lindsay Duncan Servilia of the Junii Actor Max Pirkis Gaius Octavian Actor Kerry Condon Octavia of the Julii Actor Lyndsey Marshal Cleopatra Actor Zuleikha Robinson Gaia Actor Simon Woods Gaius Octavian Caesar Actor Indira Varma Niobe Guest Star David Bamber Marcus Tullius Cicero Guest Star Haydn Gwynne Calpurnia Guest Star Guy Henry Cassius Guest Star Suzanne Bertish Eleni Guest Star Chiara Mastalli Eirene Guest Star Lorcan Cranitch Erastes Fulmen Guest Star Esther Hall Lyde Guest Star Ian McNeice Newsreader Guest Star Rick Warden Quintus Pompey Guest Star Nicholas Woodeson Posca Guest Star Coral Amiga Vorena the Elder Guest Star Lee Boardman Timon Guest Star Ciarán Hinds Gaius Julius Caesar Guest Star Manfredi Aliquo Castor Guest Star Tim Barlow Ancient Blind Oracle Guest Star Lidia Biondi Merula Guest Star Jay Simpson Triolus Guest Star David Toole Man with no legs Guest Star Bruno Heller Executive Producer William J. Macdonald Executive Producer John Milius Executive Producer Anne Thomopoulos Executive Producer Frank Doelger Executive Producer Lucy Richer Executive Producer