I'm glad he's dead, he was an arrogant tyrant of Rome.

Stewart portrayed Sejanus in the BBC miniseries I, Claudius. One of the best series on Roman history if you're into that sort of thing. Stewart definitely enjoyed the role, Sejanus was a very brash and arrogant fellow who attempted to make himself emperor during Tiberius's absence during his reign.

I, Claudius features numerous British greats so you should consider watching it just for that. An added bonus is Stewart plays a character type we rarely ever see him play later in life.