David de Keyser

Having pursued Pompey into Egypt, Caesar arrives in Alexandria and meets the boy king Ptolemy XIII, who offers the general a surprise gift. Vorenus and Pullo play liberators again, freeing Ptolemy's incarcerated sister, Cleopatra. Caesar seeks payment from Egypt for past debts, and ends up forging a strategic union to ensure his legacy.

Called upon to take action to prevent a Commonwealth country from being taken over by Marxists, Jim has his first clash as Prime Minister with the Foreign Office. Sir Humphrey doesn't really care who wins, as long as Britain keeps the contract to build the new airport.