Season 1

Escaping from Beirut with his life, Quiller discovers that rogue a Mossad agent aims to kill him in revenge for the death of his family by an Arab faction trained by a British officer.

A light airplane has crashed in the Moroccan desert. Quiller is sent to find the plane and discover what it was carrying. The opposition are already waiting and on his trail.

Quiller has to come up with a plan to a get a British spy, Dougie Cater out of Banana Republic but make it look like he has first been shot by firing squad.

The wife of a diplomat is kidnapped on her brother's farm in South Africa. Quiller is sent out undercover as a journalist and soon realises something is not right.

Quiller goes undercover to join John Carson's mercenaries who are heading for the Middle East. Unfortunately the mission has been compromised from the start by the Soviets.

On the eve of free elections, on the island of St Peter, candidates appear to be dying from voodoo. Quiller and the CIA think Joseph Field is attempting to rig the election.

Quiller is sent to Scotland to look into the death Sir Michael Foster. Evidence of a recent explosion alerts him to a group of Scottish Nationalists who are planning a bombing campaign.

Kinloch receives anonymous letters about a cabal of officers raising cash through robberies to fund a coup against the Labour government. Quiller infiltrates the Lion of England Club to root out the source.

A revolution has taken place in St Christabel and the communists have been ousted. An oil refinery may now be returned to Britain but they also want aristocrat's granddaughter Arabella who has been kidnapped.

A new type of advanced rocket launcher is stolen from a British barracks in Cyprus. Quiller is sent to the country to get them back but when his contact Kontopoulos is murdered he needs a new lead.

British defector Donald Mays, to the Soviet Union, turns up at the Austrian Embassy wanting to make a deal. He wants £1 million in exchange for three agents who are working in the UK. Quiller has to discover whether it's true.

General Fischer, a top NATO officer in charge tactical nuclear weapons, has vanished without a word. When his daughter Tracy arrives in Britain she vanishes. Quiller discovers a connection with Thundersky base and a murdered American.

When an agent is killed, Quiller heads to Munich. His only lead is Mrs Brown and her daughter Kate who is there to meet her husband, who died in 1948. When Mrs Brown is killed it leads directly to the far right Neumann Group.