The phrase "" (Latin for "it does not follow") most famously serves as the title for Season 2, Episode 5 of Star Trek: Voyager . The episode explores the unsettling nature of an existence where one's reality suddenly lacks a logical connection to the past. Plot Summary: A Life That "Does Not Follow"

: Kim's attempts to explain his situation lead Starfleet Security to suspect him of being a Maquis spy. He eventually discovers that a "time-stream" accident involving a shuttlecraft caused him to switch places with his counterpart in this timeline.

You can find more detailed production notes and fan reviews on the Non Sequitur (episode) - Memory Alpha wiki or official series overviews at StarTrek.com.

: In formal logic, a non sequitur is an argument where the conclusion does not follow from the premises. Harry Kim's current life is a "logical leap" that makes no sense based on his actual memories.

: In this timeline, Kim was never assigned to Voyager ; he is a design engineer working at Starfleet Headquarters. He has a beautiful fiancée, Libby, and a prestigious career, yet he remembers every detail of his "real" life on the ship.

: Like other famous "what if" episodes in the franchise, it allows the audience to see characters in a different light—specifically showing a version of Tom Paris who never found redemption on Voyager .

: It refers to an abrupt or unexpected turn in plot or dialogue. Kim's sudden shift from a starship in deep space to a coffee shop on Earth is a massive, jarring "non sequitur" in his personal narrative. Themes and Impact