Margo takes great pride in her new job at the surgery, but after a chance encounter with a recluse, she begins to realise where her greatest talent lies. Louisa grows closer to Sven, but as Gerry befriends a convict and Leslie begins spending all his time in the local bars, she begins to suspect she has made a mistake bringing her children to Corfu.

The family prepares for a celebration, and Margo is determined to persuade the reclusive Countess Mavrodaki to attend. Sven is put to the test by his potential family, but seems to make a good impression. Gerry begins to question whether keeping animals in his personal zoo is fair, and considers releasing them into the wild.

Louisa tries to raise some money by selling homemade food, which attracts the attention of another Englishman. However, a former lover threatens the family's idyllic existence. Gerry comes up with a plan to breed otters, Leslie accidentally shoots Roger, and Margo considers becoming a nun.

Sparring for Louisa's attention, Hugh and Spiros decide to hold a cricket match between the Greeks and the Brits.

Hugh poses a life-changing question to Louisa, only to find himself a victim of Vasilia's jealousy.

Louisa and Larry are both devastated to find that a dear relative has died.

It's Gerry’s birthday and Louisa wants to have a party and make a fuss, even though he doesn’t want to. She fails to realize that Gerry is growing up.

In the Series 3 finale, Leslie and Margo have news about their relationships, and as Louisa and Spiro grow closer, a circus comes to town.

With storm clouds gathering, the islanders realise they can no longer ignore the rumblings of war, just as it looks as though the Durrells - particularly Louisa and Spiros - may have found their happy ending. Larry marks his return by throwing an audacious play for the locals, but there are surprises for every member of the family. Series finale.