The Vidiians harvest organs from other races to replace their own in an attempt to outpace the degeneration caused by the Phage .
An interrogation reveals that they are Vidiians , an alien race that have been suffering for generations from an incurable disease called the Phage .
The Vidiians harvest organs from other races to replace Vidiians ' own in an attempt to outpace the degeneration caused by the Phage .
An interrogation reveals that they are Vidiians , an alien race that have been suffering for generations from an incurable disease called the Phage .