- Roland Culver - Augustus
- André Morell - Tiberius
- Sonia Dresdel - Livia
- Charles Lloyd Pack - Crispus
- Freddie Jones - Claudius
- Barrie Ingham - Sejanus
- Suzan Farmer - Livilla
- Derek Newark - Agrippa Postumus
- Kevin Stoney - Thrasyllus
- Kenneth Gilbert - Colonel at Planasia
- Cynthia Michaelis - Marcia
- Barry Stanton - Clemens
- Caroline Blakiston - Agrippina
- Eric Flynn - Germanicus
- George Sewell - Ennius
- Lindsay Campbell - Pompeius
- Julian D'Albie - Appuleius
- Ian Cooper - Scaurus
- Keith Pyott - Haterius
- Dallas Cavell - Calusidius
- John Phillips - Piso
- Joan Heath - Plancina
- Roger Rowland - Veranius
- John Woodvine - Vitellius
- Ralph Bates - Caligula
- Martin Potter - Nero Caesar
- Donald Eccles - Nerva
- Brian Badcoe - Sabinus
- Richard Mathews - Trio
- Jerome Willis - Macro
- Henry Gilbert - Eudemus
- Edward Harvey - Regulus
- Robert Hartley - Senate Official
- Wanda Ventham - Ennia
- Jonathan Collins - Gemellus
- Sean Arnold - Lepidus
- John Normington - Callistus
- Charles Carson - Silanus
- Jennifer White - Julia Livilla
- Luan Peters - Agrippinilla
- Godfrey Kenton - Proculus
- Arnold Ridley - Nigrinus
- Gerald Harper - Lucius Vitellius
- Barbara Murray - Caesonia
- Nicola Pagett - Messalina
- Douglas Blackwell - Cornelius Sabinus
- Roger Hammond - Pomponius
- Ian Fleming - Sentius
- Michael Hall - Capito
- Richard Kerley - Bassus
- Derek Bennett
- Philip Mackie
Freddie Jones interpreta a Claudius en la serie.
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