- Unknown:
- Robert Graves.
- Written By:
- Jack Pulman
- Producer:
- Martin Lisemore
- Director:
- Herbert Wise
- Claudius:
- Derek Jacobi
- Germanicus, Claudius's brother:
- David Robb
- Vitellius:
- Roy Purcell
- Agrippina, Germanicus's wife:
- Fiona Walker
- Caligula, Agrippina's son:
- Robert Morgan
- Castor, Tiberius's son:
- Kevin McNally
- Herod:
- James Faulkner
- Tiberius:
- George Baker
- Sejanus:
- Patrick Stewart
- Livia, Tiberius's mother:
- Sian Phillips
- Antonia, Claudius's mother:
- Margaret Tyzack
- PiSO:
- Stratford Johns
- Plancina:
- Irene Hamilton
- Slave:
- Ronald Markham
- Gershom:
- George Pravda
- Slave JOHN:
- Scott Martin
- Martina:
- Patsy Byrne
- Senator:
- Norman Ettlinger
- Woman slave:
- Souad Faress
