Lisa and Albert are suspicious when a former evader returns to the Candide. Meanwhile, Major Brandt, of the Luftwaffe Polizei, sizes up the newly arrived Ludwig Kessler.
Brandt receives an article by an escaped American airman. Thinking it contains useful intelligence, he uses it to team up with a French gendarme and identify an escape route over the Pyrenees - and almost captures Lisa.
A new aircraft is shot down. The navigator, Flight Lieutenant Peter Romsey, survives but cannot be sure of his safety. Separated from his Lifeline companions in France, he takes refuge with English author Hugh Neville and his wife Dorothy.
Recognizing the value of a propaganda coup if successful, Curtis persuades Yvette to help smuggle a Belgian minister in the puppet regime to England. Meanwhile, Lifeline has been penetrated by another German agent.
A downed British airman approaches Madame Bidout, an elderly Englishwoman and asks her for help. She hides him, but is so frightened that she calls Major Brandt, a childhood friend of her late son. The airman turns out to be another German plant working for Kessler, hoping Bidout will lead them to the resistance.
Prior Father Pierre shelters an RAF escapee in his monastery, but Brother Anselm thinks friars should stay out of the war. His betrayal brings in Kessler and the Gestapo.
Curtis is under suspicion for subversive activity and possible murder. Kessler and Brandt trace him to the Café Candide, then take him for questioning.
Curtis's cover is blown and Kessler orders a security ring around Brussels and a massive search to trap Curtis. Curtis poses as a bus driver for a Hitler Youth day trip in a desperate attempt to flee the city.
