About Star Trek: The Next Generation Season 1, Episode 22 : Symbiosis

When the Enterprise rescues a freighter with engine problems and is being drawn into a planets gravitational field, Picard gets more than he bargained for when it is discovered that the one planets inhabitants may be carrying a disease. The disease causes Picard to consider the Federation's Prime Directive and why it is necessary. Guest Stars: Mart McChesney, Brad Zerbst, Ron Gans, Walker Boone, Raymond Forchion,