The Vidiians are a fictional alien race in the Star Trek franchise. Developed by Star Trek: Voyager series' co-creators Rick Berman, Michael Piller, and Jeri Taylor, they serve as recurring antagonists during the show's first two seasons. They are represented as a nomadic species suffering from a pandemic known as the Phage, which destroys their tissue. A society with highly developed medical technology, the Vidiians harvest organs from corpses and living beings to stall the progression of the Phage, and experiment on other alien species in an attempt to develop a cure. Vidiian storylines frequently revolve around the aliens' attempts to take its Voyager crew members' organs, though a Vidiian scientist named Danara Pel serves as a love interest for The Doctor. The alien species have made minor appearances in the show's subsequent seasons, and have been included in novels set in the Star Trek universe.

Star Trek: Voyager is an American science fiction television series created by Rick Berman, Michael Piller and Jeri Taylor. It originally aired from January 16, 1995, to May 23, 2001, on UPN, with 172 episodes over seven seasons. It is the fifth series in the Star Trek franchise. Set in the 24th century, when Earth is part of a United Federation of Planets, it follows the adventures of the Starfleet vessel USS Voyager as it attempts to return home to the Alpha Quadrant after being stranded in the Delta Quadrant on the far side of the galaxy.