named Webster (Jeffry Wickham), who tells him that there is an English spy, James Stirling, highly placed in the French Government, who is now being recalled to England. Webster dies, and a government official named Lemaitre (James Cairncross) arrives and probes any conversation between Ian and the dead man. Lemaitre crosses Ian's name off the execution list. En route to the guillotine, Barbara and Susan's transport is hijacked by two men, Jules (Donald Morley) and Jean (Roy Herrick), who take them to a safe house. They are told that they will be smuggled out of France through the escape chain. Jules and Jean reassure Barbara that they will try to reunite them with Ian and the Doctor. They are then joined by another counter-revolutionary, named Léon Colbert (Edward Brayshaw). The Doctor reaches Paris and exchanges his clothes for those of a Regional Officer of the Provinces. He heads for the Conciergerie, but finds his companions gone; Ian has successfully stolen the key to his cell and escaped. Lemaitre arrives and takes the Doctor to visit Maximilien Robespierre (Keith Anderson) to report on his province. Ian follows Webster's words and finds Jules Renan, who turns out to be the man sheltering Barbara and Susan; the latter is ill in bed. When Barbara takes Susan to a physician (Ronald Pickup), they are recaptured by revolutionary police. Ian meets Colbert only to find he is the mole in the escape chain and there are armed troops waiting for him. Jules rescues Ian, killing Colbert in the process. They return to Jules' house and are stunned to meet Barbara. The Doctor has returned to the Conciergerie, where Lemaitre reports that Robespierre wishes to see him again the following day. Lemaitre ensures that the Doctor spends the night in the Conciergerie in order that he remain in Paris for his second audience with Robespierre. He is still there when Barbara and Susan are brought in as prisoners. With Susan too weak to be moved, he engineers Barbara's release on the pretext that she can be trailed to lead the security forces to the core of the escape chain. Robespierre suspects his deputy, Paul Barras (John Law), is conspiring against him and asks Lemaitre to track Barras to a secret assignation at an inn outside the city. When Lemaitre heads back to the Conciergerie, he privately unmasks the Doctor as an impostor. Lemaitre insists that the