Fringe Season 1 Episode 7

When FBI Agent Mitchell Loeb collapses in Philip Broyles office, he is rushed to hospital. The doctors there open his chest only to find a creature of some type wrapped around the man's heart. Dr. Bishop believes the creature to be a parasite of some type, but one that is man made. Olivia Dunham learns that the pattern is made up of several quasi-independent cells and that Agent Loeb may have been on to one of them. Dunham travels to Germany to follow-up on Loeb's investigation However, to get the information they want, Dr. Bishop has to get information from a dead man.