- Dawson Casting: The events of the series span 27 years, so some actors go from playing this trope straight to averting it, or from averting it to inverting it, or both. Just to give a few examples:
- André Morell, aged 58, played Tiberius from the age of 54 to his death aged 77.
- Ralph Bates, aged 27, played Caligula from the age of 18 to his death aged 28.
- Freddie Jones, aged 40, played Claudius from the age of 23 to his declaration as Emperor aged 50.
- Role Reprise: Kevin Stoney reprised his role as Thrasyllus of Mendes in I, Claudius, which also covered the reigns of the first four Roman Emperors.
Trivia / The Caesars