The Fourth Horseman (Millennium)

"The Fourth Horseman" is the twenty-second episode of the second season of the American crime-thriller television series Millennium. It premiered on the Fox network on May 8, 1998. The episode was written by Glen Morgan and James Wong, and directed by Dwight Little. "The Fourth Horseman" featured guest appearances by Kristen Cloke and Glenn Morshower.

In this episode, offender profiler Frank Black (Lance Henriksen) investigates the initial outbreak of a deadly virus, and discovers that his employers, the Millennium Group may pose a danger to his safety.

"The Fourth Horseman" was written under the belief that the series would soon be cancelled, and inspired in part by the outbreak of bovine spongiform encephalopathy in the United Kingdom. The episode has earned positive responses from critics, and was seen by approximately 4.61 million households during its initial broadcast.