The future's looking bright for the eccentric Durrells; catch up with their lives on the beautiful island of Corfu in the fourth and final season. Most of the family struggles with individual business ventures from running a guest house, attempting to get published, starting a beauty salon, and opening a zoo.

A British historian, finished with a conference in Moscow on the newly opened Soviet archives, is preparing to leave Russia for good, but a surprise visit from a former Soviet officer suddenly changes his mind. The officer reveals a deadly secret, one which promises to uncover Russia's most closely guarded conspiracy.