In Brussels, evasion line "Lifeline" is threatened when Major Brandt succeeds in identifying a safe-house and nearly captures Natalie. Lisa and Albert, who run Lifeline, are suspicious when London sends Flight Lieutenant Curtis, a former evader, to help. Some of the people whom Curtis knew previously have by now been killed or sent to labor camps. Brandt has to deal with Waffen SS Sturmbannführer Kessler, freshly transferred from Berlin to re-enforce the investigation into the evasion lines. Kessler sends the family who owned the safe-house to a labor camp in Germany.

Featuring Angela Richards, Christopher Neame, Bernard Hepton, Juliet Hammond, Jan Francis, Clifford Rose, Michael Culver, Anthony Ainley.

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