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 Coral Amiga Vorena the Elder Guest Star Lee Boardman Timon Guest Star Guy Henry Cassius Guest Star Camilla Rutherford Jocasta Guest Star Suzanne Bertish Eleni Guest Star Rafi Gavron Duro Guest Star David Bamber Marcus Tullius Cicero Guest Star Michael Nardone Mascius Guest Star Nicholas Woodeson Posca Guest Star Allen Leech Marcus Vipsanius Agrippa Guest Star Alex Wyndham Gaius Maecenas Guest Star Nigel Lindsay Levi Guest Star Ian McNeice Newsreader Guest Star Manfredi Aliquo Castor Guest Star Lidia Biondi Merula Guest Star Andy Linden Procurator Guest Star Amy Marston Deborah Guest Star Nuccio Siano Saul Guest Star Simon Smith Overseer Guest Star Rebekah Staton Althea Guest Star Romuald Andrzej Klos Sentinella 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