Spiros spends time with a glamorous Italian family who have recently arrived on the island. Louisa is jealous of the attention he is paying their new neighbors and invites the new neighbors over to learn more about them. She ends up convinced they are hiding something, while Margo feels threatened by their eldest daughter. Larry joins the fire service, and Gerry falls in love.

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.

Louisa finds herself fending off unexpected romantic advances. Leslie's arranged hunt for new guest, Colonel Ribbindane, doesn't quite go to plan when his past revisits him.

With the house guests getting ever more rowdy, Louisa worries about the villa's reputation. Margo finds a surprising way to bond with Maud, while Gerry realises he has feelings for Galini.

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.