Agent Mitchell Loeb, Broyle’s friend, collapses on an assignment. They find an engineered parasite constricting his heart and making its way into the circulatory system. Olivia talks to David Robert Jones, a biochemist who is incommunicado in Germany, for the cure.

David does not want to cooperate, but demands to talk to a colleague in exchange of the cure. The colleague is killed in a raid, and all seems lost, until Walter devises a way to wire Peter into the dead man’s brain, enabling Peter to speak on his behalf. The cure is procured and the parasite is removed, although it is revealed that the incident was a set up by Loeb to get information Peter extracted from the dead man.