Before and After (Star Trek: Voyager)

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"Before and After"
Star Trek: Voyager episode
Episode no. Season 3
Episode 21
Directed by Allan Kroeker
Written by Kenneth Biller
Featured music Jay Chattaway
Production code 163
Original air date April 9, 1997 (1997-04-09)
Guest appearance(s)
Episode chronology
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"Favorite Son"
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"Real Life"
List of Star Trek: Voyager episodes

"Before and After" is the 63rd episode of the science-fiction television series Star Trek: Voyager, and the 21st episode of the third season. It foreshadows events seen in a later episode, "Year of Hell."


Kes finds herself living short periods of time in reverse order. She first gains consciousness in sickbay as an elderly woman, surrounded by her Ocampa family born on Voyager. The Doctor is able to put her into a biotemporal chamber to try to extend Kes's normally short life-span. Her next period of consciousness occurs some days before, where the Doctor has affirmed that Kes is suffering from mental deterioration due to her old age and his plans to use the biotemporal chamber. Kes finds it difficult to be around the members of her family who she doesn't know. During these periods, she comes to learn that Voyager had suffered a "Year of Hell" some years before when facing a race called the Krenim that repeatedly assaulted the ship as it crossed their space, costing the lives of Captain Kathryn Janeway and B'Elanna Torres along with significant damage to the ship. As her periods of consciousness approach that point, she is able to work with the crew to postulate the nature of the Krenim temporal-based weapons and how to reverse the effects Kes is experiencing with a biotemporal chamber. The Doctor surmises that if Kes can obtain the temporal phase shift that affected her, he would be able to stop her backwards progression in time.

Soon, Kes finds herself experiencing the period of the Year of Hell. The ship is significantly damaged, and an undetonated Krenim torpedo is lodged in the ship. Kes witnesses the deaths of Janeway and Torres, and convinces Chakotay to let her examine the dangerous weapon. She discovers the phase shift before passing out and coming to at an earlier period. Realizing she is getting near the time she first joined the Voyager crew, she is able to convince the Doctor of her symptoms and the means to stop it using the Kremin phase shift. However, even in the biotemporal chamber, she continues to flash back, soon finding herself back with the Ocampa and still growing younger. She regresses further to an infant, then to a fetus, before she suddenly starts moving forward in time.

She eventually comes to in the present, two years since she joined Voyager and before the Year of Hell. The Doctor acknowledges the biotemporal chamber a success and Kes is cured. Despite a celebration in the holodeck for Kes's birthday, she wants to document her memories of the future, particularly the Year of Hell, to help Janeway and her crew, before she forgets them.


In the promotion for the fourth season of Voyager prior to the start of the season, the "Year of Hell" two-part episode was highlighted as being a sequel to "Before And After".[1]


  1. ^ "Out with the old, in with the new...". Dreamwatch (37): 4–5. September 1997. 

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