Lifeline is an organisation to help allied airmen escape after being shot down in occupied Europe - working with the Resistance and hiding from the Gestapo.
Some escapees are caught and shot by Kessler. One survives, but he'd rather commit suicide than talk to the Gestapo.
Drama set in German-occupied Belgium during World War Two. Curtis brings money from England for the escape plans and gets involved with Yvette.
Brandt has an article written by an ex-escapee and believes he can use it to find the escape route across the Pyrenees.
A reluctant escapee is found by a bargee, but neither the bargee or Curtis' offer of help are what they seem.
Drama in German-occupied Belgium during World War Two. A young boy finds a wounded airman and puts the Lifeline organisation at risk.
A new aircraft, with top-secret radar, is shot down. The navigator survives, but cannot be sure of his safety.
Drama in German-occupied Belgium during World War Two. Curtis wants to check out a betrayal, but Lifeline doesn't trust him.
Yvette is imprisoned in a raid in France, her uncle taken by the Gestapo. Suddenly, Lifeline is faced with collapse.
An airman cannot convince Lifeline of his identity and, in desperation, seizes Natalie as hostage.
The Gestapo successfully infiltrate the Lifeline organization and Monique falls for the infiltrator.
Yvette is persuaded to smuggle a Belgian Nazi-sympathiser to England as a propaganda coup. But Kessler has other ideas.
An English widow becomes involved with an escapee, but he is a Gestapo plant and Lifeline is put at risk.
Dom Pierre shelters an RAF escapee in his monastery - the monks have to choose between patriotism and faith.
Drama set in German-occupied Belgium during World War Two. Curtis is under suspicion. Kessler and Brandt trace him to the Cafe Candide.
Drama set in German-occupied Belgium during World War Two. The Gestapo put a security ring round Brussels to trap Curtis.
A senior army officer has to bail out and Lifeline has to prevent his interrogation, at any cost.
Drama set in German-occupied Belgium during World War Two. Lifeline has to help Russian evaders, as well as the allies.
Drama set in German-occupied Belgium during World War Two. Lifeline is landed with two special escapees - Kessler is hot on their trail.
Monique is shot in France and the authorities wish to inform her next-of-kin, but her papers are false.