The entire narrative of "A Man Escaped" builds towards the final, successful escape, an outcome revealed by the title itself. The true suspense lies in the execution. After months of painstaking preparation—chiseling his door with a sharpened spoon, braiding ropes from his mattress and a donated blanket, and crafting hooks from a lantern—Fontaine is ready. However, his plan is complicated at the last minute by the arrival of a new cellmate, the teenage soldier François Jost. Believing Jost might be a plant, Fontaine realizes he must either kill him or trust him. He chooses trust.
That night, they exit through the dismantled door. They reach the roof, and the film's sound design becomes critical as they use the noise of a passing train to mask their movements. In a moment of high tension, they must descend into a courtyard where they encounter a guard. Fontaine kills the guard, a swift and brutal act that underscores the life-or-death stakes. After a moment of hesitation where Fontaine's nerve almost fails him, they use their homemade rope and hook to cross the final gap between the inner and outer prison walls. They drop down into the foggy streets of Lyon and walk away to freedom. Fontaine's final voiceover, "Had I been alone I might still be there," reveals the hidden meaning: the intensely solitary journey of the human spirit toward freedom ultimately required an act of faith in another person to be complete.