Star Trek: Voyager

Seven of Nine loses her mind as a Borg device forces her to adopt the personalities of other drones

The crew risks calling up a hologram of an untrustworthy Cardassian doctor to save Torres from an alien life form. Roxann Dawson and David Clennon star

The crew discovers a massive ocean populated by a maritime alien species known as the Moneans

While trying to transport illegal refugees, Janeway is forced to put her faith in a defector who offers to help

The Doctor discovers that his short-term memory has been tampered with, and investigates who was responsible

The ship is involved in a battle with an alien species from the fifth dimension, which believes Paris's holographic imagery is a threat

A shuttle carrying Tuvok, Paris and the Doctor crash-lands on a deserted wasteland

Celebrations are the order of the day as the weary crew finally finds a quick way home - but Seven of Nine believes their apparent good fortune hides a dark secret

Part one of two. The dreaded Borg return and present Seven of Nine with a chilling ultimatum - rejoin the collective for good or perish with her fellow crew members