Star Trek: Voyager - Season 4 Episode 24 -

Desperate to replenish the ship's power resources, Voyager seeks out a deuterium signature on a class "Y" a.k.a. "Demon Class" planet. After nearly being lost, Paris and Kim are thought to be "bioformed" to the planet's atmosphere. Further investigation uncovers a strange life form which after making physical contact with the away team, has developed self-awareness and will do anything to keep it.