Captain Janeway and Neelix return to Voyager to find it seized by a macrovirus alien — an unknown gelatinous lifeform which attacks and overwhelms the crew and disables the ship. After Neelix is incapacitated, Captain Janeway must face the fight of her life, crawling through the disabled ship's dark passageways to elude the alien assault. Meanwhile, The Doctor works to find an antidote for the macrovirus and tells the Captain about his first away mission to the Garan mining colony, the source of this mysterious and severe viral infection.

Michael Fiske (Garan Miner)
Albie Selznick (Tak Tak Consul)

• This was The Doctor's first away mission, using his new portable emitter.