Albert is finally released from prison and reunited with Monique. The Lifeline personnel continue to be in danger of reprisals from their own people and the Communists for alleged collaboration with the Germans, but Albert refuses to leave the Candide. The Allies are still making their way towards Brussels, and Natalie and Alain join the offensive. As Kessler and his men leave the city, Reinhardt stays behind to complete his investigation into Lifeline and pays one last visit to the Candide, just as Paul Vercors emerges to take ultimate revenge on Albert.

The Allied advance continues as they at last enter Belgium, and the Germans begin to plan a strategic withdrawal from Brussels. Albert is petitioning for his release from prison, while Bradley endeavours to forge links with other resistance groups. The people of Brussels are now left to their own devices, and recriminations are brewing for collaborators and black marketeers. Kessler comes to help Madeleine, while Alain offers Monique and Natalie a place to hide. Meanwhile, Reinhardt at last obtains proof that the Candide is Lifeline’s base of operations, and prepares to strike.

Albert is imprisoned on trumped-up charges as part of a Communist revenge plot, and Monique is left to take charge of both Lifeline and the Candide. Alain discovers the existence of a false escape line set up by Reinhardt to flush them out and that one of their evaders, “Mad” Mike Miller, had previously been shot down and helped by Lifeline. Monique must make a difficult decision if she is to maintain Lifeline’s safety.

An assassination attempt has been made on Hitler, and Kessler believes that Reinhardt is involved in the conspiracy. He begins to gather information that he hopes will provide his colleague’s guilt. Meanwhile, Albert becomes aware that the Communists are once more out to get Lifeline, and that he is their target.

Vercors has taken Albert, Monique and Reinhardt prisoner, and plans to hang Albert as a collaborator and a murderer. Only the Allies, helped by Natalie, can save him but they have only just entered Brussels. Meanwhile, Kessler and Madeleine are trekking on foot towards Germany through the Belgian countryside. To evade capture by the Allies, Kessler decides to take on a new identity.

Kessler, still posing under an alias, and Reinhardt find themselves interned in the same prison camp for German officers. Kessler learns that Reinhardt surrendered himself to Albert at the Candide and is determined to dispose of him with a trumped-up court martial. Madeleine is forced to make a decision that will change her life forever. In Brussels, Albert and the others learn they are to be decorated for their selfless contribution to the war effort and Albert is given full ownership of the Candide as a reward for his bravery. However, it is a bittersweet victory for Albert as he has lost Monique, who is about to marry Captain Durnford and leave for a new life in England. The Second World War is over.

At Gestapo headquarters, Kessler takes an instant dislike to the newly arrived Luftwaffe Major Hans Dietrich Reinhardt, who has joined him in a final concerted attempt to crush the evasion lines. As the Allies continue to advance from the invasion beaches, Lifeline must continue their efforts in getting airmen back to Britain, but when Natalie attempts to guide two evaders down to Spain, it becomes clear that their work may at last be over.

Major Nick Bradley returns to Brussels to co-ordinate resistance activities whilst waiting for the Allies’ final push, and clashes with Monique over leadership of Lifeline. A tense time is in store for Lifeline when Alain is arrested, and Bradley decides to make a deal with a German officer to try to get him out of Gestapo headquarters. However, the officer demands one million francs in exchange for Alain’s freedom.

As Bradley’s army remains in hiding along the Dutch border, he and Natalie become closer as they work together planning the raid on the V2 site. To increase his chances of success, Bradley must try to obtain the rocket delivery schedule and plans to get the information by dining with Kessler at the Candide…. Meanwhile, Reinhardt is rapidly closing in on Lifeline, with Natalie as his chief suspect.

Lifeline’s original function is now over – the Allied advance has severed the evasion lines and it is now a matter of keeping evaders safely hidden until the war is over. Despite Kessler’s irritation at Reinhardt’s manner and methods, his efforts pay dividends when he discovers a Lifeline safehouse. Two of his new prisoners commit suicide rather than talk, but Reinhardt is determined that the third prisoner will give information under torture. Albert and Monique receive a tip-off that the middle-aged Chantal sisters, who are based in Senlis and often shelter airmen for Lifeline, are in imminent danger.

Bradley travels to the Ardennes to continue recruiting his own private army of former airmen to engage in sabotage activities – the target is V2 testing sites. Bradley’s first objective, however, is to hijack a convoy of weapons and he asks Monique for assistance in recruiting men and resources. Lifeline, previously an evasion network, is now a fully-fledged guerrilla operation

The Allied liberation of Brussels paradoxically brings terror for the former Lifeline workers. About to face savage punishment after being falsely accused of collaboration, Monique is rescued thanks to Natalie and a British officer, Captain Stephen Durnford. She moves in with Natalie, where Durnford visits her and the two become close. Natalie tries to persuade Albert to declare his feelings for Monique, but he remains convinced that she will come back to him and the Candide. Meanwhile, Hans Van Broecken has to deal with two German deserters who have stowed away aboard his barge.

Still languishing in prison, Albert learns that he was set up by the Communist leader Paul Vercors. Meanwhile, Dr. Keldermans makes a shocking discovery when examining an evader at a safehouse – the man is dying of bubonic plague. Lifeline’s personnel face the horrifying possibility of being wiped out by the deadly disease.

Curtis’ cover has been blown and Kessler knows that he is part of the resistance. To avoid endangering the others, Curtis goes to ground in Brussels. Knowing that Lifeline is at last in his sights, Kessler orders that all routes out of the city are blocked and co-ordinates a house-to-house search throughout the city. In desperation, Curtis goes to the Candide to ask for help, and Monique comes up with a highly audacious escape plan.

1969. Albert, Monique, Natalie and Alain are invited to take part in a British TV documentary “In Our Time” commemorating the 25th anniversary of the Allied liberation of Brussels. Also participating is Kessler, now known as Manfred Dorf. The former Lifeline personnel reunite at the Candide, and discuss their lives during the war. NB: The episode was never broadcast due to quality issues and the feeling that the content ran contrary to the main dramatic themes of the overall series.

Lifeline, a Brussels-based resistance organisation smuggling downed RAF fliers back to Britain, is endangered when Luftwaffe Major Erwin Brandt blows one of their safehouses. The Lifeline leaders, Lisa Colbert and café proprietor Albert Foiret, are suspicious when London sends Flight Lieutenant John Curtis, who had previously gone down the line with Lisa, to help co-ordinate their activities. Brandt, meanwhile, also finds assistance from Gestapo Sturnbannfuhrer Ludwig Kessler, transferred from Berlin to crack down on the evasion lines.

Albert and Lisa continue to be suspicious of Curtis, whilst Lifeline is stretched to its limit trying to deal with several evaders. The Germans capture one evader, Sergeant Walker, who has travelled down the line and is familiar with several of Lifeline’s personnel. Walker makes a desperate bid for freedom to avoid talking and throws himself down a staircase at Gestapo headquarters. As Walker recovers in hospital, Lifeline deliberate over whether he can be rescued from the Germans or if he must be silenced to preserve the security of the line.

The Jewish population of Brussels is being systemically deported according to colour-coded identification papers developed by the Germans. Curtis becomes involved with a Jewish family hiding out in the city and asks Lisa if Lifeline can help, but Lisa is unwilling to put the line, which is supposed to help RAF evaders not Jews, at risk. Curtis himself is still under suspicion by Albert, when Lisa’s uncle, bank manager Gaston Colbert, identifies Belgian banknotes he brought over from London as forgeries. Kessler obtains some of the notes, and realises that they are too accurate to be real and have been made by the Belgian treasury plates, which were evacuated to London before the German invasion. He believes that the notes will bring him closer to Lifeline.

An American airman has written a magazine article about his experiences being shot down in Europe and getting back home with the help of the evasion lines. British Intelligence has blocked the article’s publication, but Brandt has managed to obtain a copy from German intelligence based in America. Studying the article, he begins to deduce the probable route taken during the evasion and travels to the Pyrenees, where he enlists the aid of Malaud, a French policeman, to close in on the line. Meanwhile, Lisa is also in the area, taking some evaders down the very route Brandt is so close to tracking down.

The safety of Lifeline is at risk when Albert deduces that the Candide is being watched by a Gestapo spy, while Lisa continues to resent Curtis’ presence and his domineering take-charge manner. A wounded RAF evader, Finch, finds sanctuary with Hans Van Broecken, a Dutchman who lives on a barge with his wife Lena. Finch plans to desert the army and escape to Switzerland and finds a kindred spirit in Hans, who is in fact German and deserted during the First World War. Hans plans to take Finch to Switzerland himself on the barge, but Lifeline becomes involved when Lena receives a visit from her niece – Natalie. However, helping evaders escape to comfortable Swiss internment is not Lifeline’s purpose, and how can Finch be involved with Lifeline with the Candide under German surveillance?

Lifeline’s latest intake of evaders have been forced to leave a wounded colleague behind, hidden in a barn, but Lisa and Albert are unable to make a move due to heavy German activity in that area. The wounded evader, Sergeant Howson, is befriended and helped by a young boy, Jean-Paul Dornes, but Howson needs medical attention and Jean-Paul has to contact the resistance. Unfortunately, Jean-Paul’s mother Anna, who has raised him alone since her husband died in the fighting and is now involved with Emil Schnorr, a corporal from the local barracks, is sympathetic to the Germans.

Flight Lieutenant Peter Romsey, a RAF navigator, is one of Lifeline’s latest customers and London are anxious for his swift return – his technical knowledge of the Oboe navigation system is vitally important. Natalie takes Romsey and other evaders down the line, but Romsey is separated from the others and takes the wrong train, finding himself lost in the French countryside. As Lifeline tries to track him down, Romsey finds unexpected assistance from Hugh and Dorothy Neville, an expatriate English couple. A celebrated author utterly disillusioned with the war, Neville must decide where his true loyalties lie when Romsey turns up on his doorstep.

In the aftermath of the Romsey business, a German newspaper publishes British military secrets. Curtis decides that the traitor must be found and dealt with. He travels to France and retraces Romsey’s steps. Meanwhile, Albert is still suspicious of Curtis and decides that once he is away from Brussels he will reveal his true colours. Monique follows Curtis to France to watch him and finally prove whether he is trustworthy or not, while Curtis’ investigations lead him to the Neville residence.

When Lisa Colbert is arrested whilst meeting a contact near Paris, the whole future of Lifeline is put at risk. This also leads to her uncle being arrested and interrogated by Kessler. Whilst in prison, Lisa must decide whether she can trust her fellow inmates who claim to know who she is and how they can help her escape. These events will lead to tragedy, both personal and for Lifeline.

With so many evaders, Lifeline’s resources are once more stretched to the limit and they must watch their backs after recent events. Jacques and Natalie are dispatched to check out a young South African evader, Noel Uys, and have to consider eliminating him when his answers to their questions fail to satisfy either them or London. In desperation to survive, Uys overpowers Jacques and armed with a shotgun, takes Natalie as his hostage.