I, Claudius - Season 1 Episode 5

Germanicus returns from Germania in triumph and he and Claudius catch up on family news – Claudius now has a son but is not enjoying married life. He tells Germanicus what Postumus had passed onto him about Livia's murderous exploits and Germanicus in turn tells the emperor. Augustus is pleased with Claudius and apologizes to him for doubting his capabilities. As Augustus visits Postumus to restore him to his will, Livia works out what has happened and initially suspects Livilla, believing Claudius to be too stupid. Augustus is determined to survive any efforts to poison him and resolves only to eat food he has grown himself. However he falls ill and dies as Livia has presumably poisoned the fruit trees in his garden. Postumus is killed by the brutal soldier Sejanus and at last Livia has her wish – to see Tiberius declared emperor of Rome.