Claudia tells Elizabeth about Philip's affair with Irina; Elizabeth decides to be his professional partner only and abandon the "real marriage". Elsewhere, the KGB has hired a West German contractor to kill American scientists, but has changed its mind and cannot recall him. With unwitting help from Philip's informant Martha (Alison Wright), an FBI clerical worker, the Jennings track him down and eliminate him. However, he has already rigged a time bomb that kills a scientist and three of his FBI bodyguards — Gaad vows vengeance. Meanwhile, until Nina can be extracted for protection, Gaad gives Stan the keys to a safe house in which to meet her, which she surmises Stan means to be their love nest. Lastly, after being spurned by Martha, Agent Amador becomes suspicious and starts to follow her.